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63results about How to "Increase electrostatic force" patented technology
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Method for manufacturing a micromechanical device
InactiveUS6369931B1Slight frictionIncrease electrostatic forceDecorative surface effectsSolid-state devicesEngineeringTorsional vibration
A method for manufacturing a micromechanical device, in particular a micromechanical vibrating-mirror device, having the following steps: making available a three-layer structure having a first layer, a second layer and a third layer, the second layer lying between the first and the third layers; etching through the first layer up to the second layer to produce an island region, lying on the second layer, which is joined to region of the first layer surrounding the island region by way of one or more connecting webs, and etching through a region of the third layer up to the second layer and removing a region of the second layer below the island region in such a way that the island region can perform movements, preferably torsional vibrations, about the one or more connecting webs, the torsional vibrations having such an amplitude that a part of the island region extends into the etched-through region of the third layer.
Owner:ROBERT BOSCH GMBH
Optical scanner having multi-layered comb electrodes
InactiveUS20060268383A1Increase electrostatic forceElectrostatic motorsOptical elementsInsulation layerOptical scanners
Optical scanners having a multi-layered comb electrode structure and methods to increase driving force and angle are provided. The optical scanner includes: a stage which performs a seesaw motion in a first direction; a support unit which supports the seesaw motion of the stage; and a stage driving unit including driving comb electrodes extending outward from opposite sides of the stage in the first direction and fixed comb electrodes extending from the support unit facing the driving comb electrodes such that the driving comb electrodes and the fixed comb electrodes alternate with each other. Each of the stage, the support unit, and the stage driving unit is made of a plurality of conductive layers and insulation layers between the conductive layers.
Owner:SAMSUNG ELECTRONICS CO LTD
MEMS digital linear actuator
ActiveUS7583006B2Fine surfaceIncrease electrostatic forceMountingsElectrostatic motorsElectrostatic actuatorEngineering
In accordance with an embodiment of the present invention, an electrostatic actuator has a base having a plurality of base pillars formed thereon and has a stage having a plurality of stage pillars formed thereon. The controlled application of voltage signals to the base pillars and / or the stage pillars results in electrostatic force that effects movement of the stage with respect to the base.
Owner:DIGITALPTICS MEMS
Device with Optimised Capacitive Volume
InactiveUS20080192406A1Increase capacityIncrease electrostatic forceMechanically variable capacitor detailsFixed capacitor electrodesEngineering
Owner:COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
Preparation and application of hyperbranched retarder
InactiveCN109265619AImprove compatibilityHigh water reduction efficiencyHyperbranched polymersPolymer
The invention relates to the technical field of concrete additives, and more specifically relates to application of a hydroxyl terminated hyperbranched polyester hyperbranched retarder in adjustment of retardation time of concrete. A new hyperbranched retarder is synthesized by synthesizing a carboxyl terminated hyperbranched polymer first, then performing end capping on the carboxyl terminated hyperbranched polymer, and synthesizing the hydroxyl terminated polymer into a main chain. When used in the field of concrete additives, the hyperbranched retarder can well improve the mobility of concrete and prolong the retardation time, and the hyperbranched retarder has a simple and convenient synthesis process, is easy to industrialize and has superior performance.
Owner:UNIV OF JINAN
Oscillation control method for micromechanical resonator and micromechanical resonator
ActiveCN104333344AImprove stabilityControl natural frequencyImpedence networksVibration controlReciprocating motion
The invention discloses an oscillation control method for a micromechanical resonator and the micromechanical resonator. The micromechanical resonator comprises a substrate, and an oscillation structure and a driving structure which are arranged on the substrate. The driving structure is used for driving the oscillation structure of the micromechanical resonator to move in a reciprocating way, generating facilitating electrostatic force which is applied to the oscillation structure and facilitates reciprocating movement of the oscillation structure when the oscillation structure moves in the reciprocating way, and generating restricting electrostatic force which is applied to the oscillation structure and restricts reciprocating movement of the oscillation structure so that frequency deviation generated by the softening effect of an electrostatic spring and frequency deviation generated by the hardening effect of the electrostatic spring in reciprocating movement of the oscillation structure can be mutually cancelled, and thus the micromechanical resonator is controlled to work at the inherent frequency and work stability of the micromechanical resonator is enhanced.
Owner:SENODIA TECH (SHANGHAI) CO LTD
Air-coupled capacitive micromachined ultrasonic transducer with T-shaped cavity structure and preparation method thereof
ActiveCN109174595AIncrease working voltageImprove reception performanceTelevision system detailsPiezoelectric/electrostriction/magnetostriction machinesCapacitive micromachined ultrasonic transducersElectromechanical coupling coefficient
The invention discloses an air-coupled capacitive micromachined ultrasonic transducer with a T-shaped cavity structure and a preparation method thereof. Annular stress relief grooves are formed in theareas, fixed to the surfaces of supporting columns, of a vibration thin film. A cavity of the air-coupled capacitive micromachined ultrasonic transducer is T-shaped, that is, the electrode distance between upper and lower electrodes in the central region of the cavity is greater than the electrode distance between upper and lower electrodes of the region, close to the supporting columns, on the periphery of the cavity. According to the air-coupled capacitive micromachined ultrasonic transducer with the T-shaped cavity structure and the preparation method thereof, design of the T-shaped cavityis used for reducing the electrode distance between the upper and lower electrodes in the area on the periphery of the cavity, thus the average displacement of the thin film can be increased withoutaffecting the maximum amplitude of the thin film, then the output sound pressure is increased, and the electromechanical coupling coefficient and receiving sensitivity are improved; in addition, the method of forming stress relief grooves in the fixing end of the thin film can further reduce constraint of the fixing area on deformation of the thin film, deformation of the thin film is increased and the output sound pressure is improved.
Owner:XI AN JIAOTONG UNIV
Capacitive type MEMS resonator with multi-pairs of driving induction electrodes
ActiveCN106992768AIncrease electrostatic forceIncrease output currentImpedence networksVibration amplitudePower flow
The invention belongs to the technical field of electronic sciences, and specifically provides a capacitive type MEMS resonator with multi-pairs of driving induction electrodes. A problem that the existing capacitive type resonator is small in output current and bad in carrying load capacity is overcome. The MEMS resonator comprises one vibration block, four vibration block support beams, four vibration block anchor points, four input-output electrodes, four electrode support beams and four electrode anchor points; four pairs of driving induction electrodes are constructed by use of a method for performing partitioned doping on the vibration block and doping the input-output electrodes, so that the electrostatic force of the resonator in working is greatly increased, the output current and the maximum vibration amplitude of the resonator are greatly increased, and the driving capacity of the resonator is improved.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Flexible capacitive micromachined ultrasonic transducer array with increased effective capacitance
ActiveCN102498586AIncrease electrostatic forceSemiconductor/solid-state device manufacturingMechanical vibrations separationPhysicsEffective capacitance
A Capacitive Micromachined Ultrasonic Transducer (CMUT) (200) comprises a membrane (220) operatively connected to a top electrode (210) and a bottom electrode having a concave void (230). When a Direct Current (DC) bias voltage is applied, the membrane (220) is deflected towards the bottom electrode so that a peripheral edge region of the membrane (220) is closer to the bottom electrode and an electrostatic force proximal to the peripheral edge region of the membrane (220) is increased.
Owner:THE HONG KONG POLYTECHNIC UNIV
High-voltage static suspension circuit suitable for ground testing of static suspension acceleration meter
ActiveCN104237563ARealize the suspension experimentIncrease electrostatic forceTesting/calibration of speed/acceleration/shock measurement devicesVoltage controlDriving circuit
The invention provides a high-voltage static suspension circuit suitable for ground testing of a static suspension acceleration meter. The circuit comprises a reversal phase circuit, an upper electrode plate high-voltage drive circuit, a lower electrode plate high-voltage drive circuit and a high-voltage power source. Voltage control signals output by a PID controller are used as input of the reversal phase circuit. Output of the reversal phase circuit and offset control signals are used as input signals of the lower electrode plate high-voltage drive circuit. The voltage control signals and the offset control signals are used as input signals of the upper electrode plate high-voltage drive circuit. Offsetting is carried out on the voltage control signals to obtain high-voltage control signals of an upper electrode and a lower electrode respectively. The high-voltage control signals are used for controlling base currents of a high-voltage drive audion, so that currents flowing through a collector of the audion are controlled; voltage dividing is carried out on the high-voltage power source through a voltage dividing resistor, proper voltage is exerted on the upper electrode and the lower electrode corresponding to high-precision static suspension acceleration meter sensors, and electricity large enough is provided for realizing suspension testing of testing masses of the acceleration meter.
Owner:LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
Two-dimensional micro-mirror array enhancements
InactiveUS7031045B2Improve instabilityIncrease deflection angleCoupling light guidesRotational axisMicro mirror
A micro-mirror strip assembly having a plurality of two-dimensional micro-mirror structures with improved deflection and other characteristics is presented. In the micro-mirror structures, electrodes for electrostatic deflection are disposed on conical or quasi-conical entities that are machined, attached or molded into a substrate. The electrodes are quartered approximately parallel to or offset by 45 degrees from rotational axes to form quadrants. Torsion sensors are provided along the axes of rotation to control deflection of the quadrant deflection electrodes.
Owner:RPX CLEARINGHOUSE
A novel graphene composite type electrostatic loudspeaker diaphragm and a preparation method thereof
InactiveCN109743671AStable structureReduced Polarization VoltageElectrical transducersElectrically-conductive paintsWater basedSound sources
Owner:SHENZHEN GUOCHUANG JIAWEI GRAPHENE TECH CO LTD +1
Display device
InactiveUS20130077146A1Overcomes drawbackImprove featuresElectrostatic motorsFlexible microstructural devicesDisplay device
A fixed aperture includes a first fixed slit and a second fixed slit which are arranged respectively in regions positioned on both sides with a moving line sandwiched therebetween. A drive aperture includes a first drive slit and a second drive slit which are arranged on both sides with the moving line sandwiched therebetween. The first fixed slit and the first drive slit are formed in an extending manner along a first line, and are arranged such that these slits communicate with each other when a shutter is at a position where the transmission of light is allowed. The second fixed slit and the second drive slit are formed in an extending manner along a second line which intersects with the first line, and are arranged such that these slits communicate with each other when the shutter is at a position where the transmission of light is allowed.
Owner:SNAPTRACK
High-molecular nano-fiber net structure binding material and preparation method thereof
ActiveCN109135592AImprove conductivityFully stretchedElectro-spinningFilm/foil adhesives without carriersFiberPolymer science
The invention discloses a high-molecular nano-fiber net structure binding material and preparation method thereof. The method includes the steps: firstly, dissolving EVA (ethylene-vinyl acetate copolymer) resin in solvents in a stirring manner to prepare 4-10% of EVA electrostatic spinning fluid; secondly, performing electrostatic spinning by the electrostatic spinning fluid to prepare an EVA nano-fiber membrane which can serve as a binding material. According to the binding material, bonded materials can be effectively and uniformly bound, the diameter of a nano-fiber is small, specific surface area is large, distribution is uniform, so that bonding sites of the material are small, and bonding areas are uniformly distributed, so that uniform compactness and strong performance of the material are greatly improved.
Owner:ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
Endurance testing apparatus of micro-structure crankle driven by parallel plate capacitance
InactiveCN1963444ATo overcome the shortcomings of only horizontal driveOvercoming Vertical Electrostatic DriveStructural/machines measurementMaterial strength using steady torsional forcesMicro structureParallel plate
This invention relates to one parallel board capacitor drive micro structure fatigue test device, which comprises three electrodes, wherein, the drive one connected to alternating current to form parallel board drive tank through electrode bottom electrode layer and first hanging board to realize hanging board vertical drive; electrode bottom layer and second hanging parallel board form parallel capacitor sensor to get test distance changes between hanging board and bottom electrode; the third electrode is connected to earth.
Owner:BEIJING UNIV OF TECH
Device with optimised capacitive volume
InactiveUS7808766B2Increase capacityIncrease electrostatic forceMechanically variable capacitor detailsFixed capacitor electrodesEngineering
Owner:COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
Electromechanical device and electrical device with the electromechanical device
InactiveUS20090283391A1Improve reliabilityLow costElectrostatic/electro-adhesion relaysWaveguide type devicesCapacitanceDevice form
When a high power signal is input to an electromechanical device, electrostatic force can automatically and unintentionally drive the movable electrode. A high reliability electromechanical device that prevents this is achieved. The electromechanical device of the invention is an electromechanical device formed on a substrate, and having a signal electrode and a drive electrode formed across a gap from a movable electrode. Applying an attraction force between the movable electrode and the drive electrode enables the movable electrode to contact the signal electrode. A high electrostatic capacitance is formed by disposing the movable electrode and drive electrode in opposition with a dielectric layer therebetween on the RF signal input port side. As a result, the potential difference between the movable electrode and drive electrode is reduced even when a high power signal is input, and a high reliability electromechanical device can be achieved.
Owner:PANASONIC CORP
Easily-stripped environmentally-friendly film, and bamboo chopstick adsorbing technology thereof
ActiveCN108912630AEasy to peelEasy to grabTablewaresElectrostatic adsorptionEnvironmentally friendly
The invention belongs to the field of polymer materials, and concretely relates to an easily-stripped environmentally-friendly film, and a production method and a bamboo chopstick adsorbing technologythereof. The easily-stripped environmentally-friendly film comprises, by weight, 50-65 parts of PLA, 30-45 parts of PBAT, 2-10 parts of chitosan, 0.1-1 part of nanometer titanium dioxide, 3-8 parts of poly(3-hydroxybutyrate-co-3-hydroxhexanoate), 0.2-0.8 part of a chain extender and 0.1-1 part of a lubricant. The film has a good biocompatibility, can be composted and decomposed under natural conditions, and ensures that the film has no pollution to the environment after being discarded; the environmentally-friendly film can be completely adsorbed to bamboo chopsticks through electrostatic adsorption, so the problem of pollution of bacteria existing in the use process of the bamboo chopsticks to foods is avoided, and the cleaning problem of the used bamboo chopsticks is solved; and the easily-stripped environmentally-friendly film has the advantages of using of a routine device, simple technology, easiness in operation, and convenience in industrial promotion and application.
Owner:黑龙江鑫达生物基复合材料有限公司
Polymer nonwoven nanoweb having ionic functional group and respirator mask comprising the same
InactiveUS20180185678A1Improve filtration efficiencyEffective filteringBiocideCation exchanger materialsFiberSide chain
Polymer nonwoven nanoweb containing ionic functional group and respiratory mask including the same are provided. The polymeric nonwoven web comprises polymer fibers having a diameter in the nanometer range and having a polymer with an ionic functional group in its main chain or side chain. The ionic functional group may be a sulfonate group, an ammonium group, an azanide group, a phosphonate group, a phosphate group, or a zwitterion group having two of these ionic functional groups linked. The polymeric nonwoven web may further comprise a counter ion having a charge of opposite sign to the charge of the ionic functional group, such as Ag+ or I−.
Owner:GWANGJU INST OF SCI & TECH
Electrostatic device
InactiveCN1479964AIncrease electrostatic forceImprove power densityCapacitor with electrode distance variationPiezoelectric/electrostrictive devicesIntegrated circuit manufacturingEngineering
An electrostatic device ( 10 ) includes a first flexible electrode ( 1 ) on which a plurality of second electrodes ( 2 ) are mounted so as to move with the first electrode ( 1 ). Upon the application of an electrical charge, the or each second electrode ( 2 ) causes deflection of the first electrode ( 1 ) which deflection is enhanced by the movement of the second electrode therewith. A variety of different designs of the device are possible to provide movement of the first electrode in a plurality of directions and also different types of in and out of plane movement, including rotation and twisting. The structure enables the device to operate at voltage levels compatible with integrated circuits and for the device to be manufactured using integrated circuit manufacturing techniques.
Owner:拉德・哈桑・达巴
Ink jet head having an electrostatic actuator, ink cartridge, and inkjet printer
An inkjet head having an electrostatic actuator and a manufacturing method of the same are disclosed. The inkjet head having an electrostatic actuator, comprising a stator, on which is formed a plurality of comb pattern shaped first protrusion parts and second protrusion parts in both directions, and a rotor consisting of a first component and a second component, the ends of which join with the diaphragm, wherein a third protrusion part is formed on the first component, facing the first protrusion parts and meshing with the first protrusion parts without contact; and a fourth protrusion part is formed on the second component, facing the second protrusion parts and meshing with the second protrusion parts without contact, may decrease the size of the head composition and may increase the electrostatic force so that a large displacement may be obtained with little voltage to increase the ink discharge pressure.
Owner:SAMSUNG ELECTRO MECHANICS CO LTD
High-voltage electrostatic levitation circuit for ground testing of electrostatic levitation accelerometers
ActiveCN104237563BRealize the suspension experimentIncrease electrostatic forceTesting/calibration of speed/acceleration/shock measurement devicesAccelerometerControl signal
Owner:LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
Multi-step microactuator
ActiveUS20070182276A1Simple driving methodStrong forceElectrostatic motorsOptical elementsEngineeringDegrees of freedom
A multi-step microactuator is provided with the multiple supports in a stepper plate to give multi-step displacement to a controlled object. The microactuator has advantages such that multiple motion can be applied to the controlled object and that the object can be controlled in a low driving voltage and that simple motion control is applied by digital controlling and that the degrees of freedom in motion of the object can be chosen by the number of the stepper plate and that only single voltage is needed for driving the micromirror motion. With many advantages, the multi-step microactuator provides a solution to overcome the difficulties in controlling multi-step motion.
Owner:STEREO DISPLAY
Preparation method of organic-inorganic ferroelectric polymer composite film
PendingCN114171674AImprove ferroelectric propertiesSimple preparation processPiezoelectric/electrostrictive device manufacture/assemblyPiezoelectric/electrostrictive device material selectionPolymer scienceComposite film
The invention discloses a preparation method of an organic-inorganic ferroelectric polymer composite film. The method comprises the following steps: by taking a graphene / copper high-index surface with one-dimensional periodic potential on the surface as a substrate, uniformly dissolving vinylidene fluoride-trifluoroethylene copolymer (P (VDF-TrFE)) powder in a tetrahydrofuran organic solvent, then adding a ground single crystal lead titanate (PbTiO3) mesoporous material, fully stirring, spin-coating a proper amount of solution on the substrate, and drying to obtain the graphene / copper composite mesoporous material. And carrying out vacuum drying and annealing treatment to obtain the organic-inorganic ferroelectric polymer composite film. The composite film prepared by the method is good in orientation, shows excellent ferroelectric properties, and has wide application prospects in flexible energy transducers, sensing devices and ferroelectric storage devices.
Owner:ZHEJIANG LAB
Using method of electrostatic dust collection device for construction site
ActiveCN111632762AGood dust removal functionRealize automatic dust removal functionExternal electric electrostatic seperatorElectric supply techniquesWater useWater storage
The invention discloses a using method of an electrostatic dust collection device for a construction site. The method comprises the following steps of: S1, injecting cleaning water, i.e. injecting a certain volume of clear water into a water storage position of the dust collection device; S2, mounting the dust collection device, i.e. fixedly hanging the dust collection device at a high position ofa construction site; S3, removing dust, i.e. taking down the dust collection device hung for a period of time from the high position, and pouring out the dust in the air filtered and collected in thedust collection device; and S4, cleaning the dust collection device, i.e. cleaning a dust collection part of the dust collection device. By arranging dust removal pipes, springs and a driving mechanism, wind power can be used as a driving force to enable the dust removal pipes to generate static electricity to adsorb dust in the air, meanwhile, water can be pumped to clean the surface of the dustremoval pipes, and good dust suction capacity can be guaranteed to the dust removal pipes all the time, therefore the automatic dust removal function of a construction site is achieved.
Owner:山东一滕建设集团有限公司
Preparation and application of hydroxyl-terminated hyperbranched polyamide retarder
The invention relates to the technical field of concrete admixtures, more specifically, the invention relates to application of a hydroxyl-terminated hyperbranched polyamide retarder in adjusting theretarding time of concrete. Firstly, a hydroxyl-terminated hyperbranched polymer is synthesized, and then the hydroxyl-terminated hyperbranched polymer is subjected to addition polymerization, so thata novel hydroxyl-terminated hyperbranched polyamide retarder is synthesized. The hydroxyl-terminated hyperbranched polyamide retarder is applied to the field of concrete additives, so that the flowing property of concrete can be well improved, the retarding time is prolonged, the synthesis process is simple and convenient, the industrialization is easy, and the retarder is excellent in performance.
Owner:UNIV OF JINAN
Method for preparing nano-melt-blown non-woven fabrics by electrospinning
ActiveCN105803668BLow costUniform and adjustable structureNon-woven fabricsPolymer scienceElectrospinning
Owner:ZHONGYUAN ENGINEERING COLLEGE
V-type electric coalescence dehydration dynamic experimental device
PendingCN110064231AImprove hydrophilicityIncrease electrostatic forceLiquid separation by electricityWater storage tankImage acquisition
The invention discloses a V-type electric coalescence dehydration dynamic experimental device. The device comprises an oil-water emulsion preparation device, a V-type dynamic electric coalescence device, an image acquisition and treatment device and a circulation recovery device; the oil-water emulsion preparation device comprises a sedimentation tank, a water storage tank and a stirring reactor,wherein the sedimentation tank and the water storage tank are connected with an inlet of the stirring reactor separately, an oil-well pump is arranged between the sedimentation tank and the stirring reactor, and the bottom of the sedimentation tank is provided with a water outlet; an outlet of the stirring reactor is connected with an inlet of the top of the V-type dynamic electric coalescence device through a diaphragm pump; the inner portion of the V-type dynamic electric coalescence device is provided with one or more groups of V-shaped electrode plate sets, each V-shaped electrode plate set comprises an upper layer electrode plate and a lower layer electrode plate, the upper layer electrode plates and the lower layer electrode plates are arranged in parallel in a V shape, the upper layer electrode plates are connected with the positive electrode of a high-voltage electrostatic generator, the lower layer electrode plates are connected with the negative electrode of the high-voltageelectrostatic generator; the bottom of the V-type dynamic electric coalescence device is connected with a recycling device, and the design is more compact in structure and higher in efficiency than existing design.
Owner:JIANGSU UNIV
Multi-step microactuator providing multi-step displacement to a controlled object
ActiveUS7898144B2Simple driving methodStrong forceElectrostatic motorsOptical elementsDegrees of freedomEngineering
A multi-step microactuator is provided with the multiple supports in a stepper plate to give multi-step displacement to a controlled object. The microactuator has advantages such that multiple motion can be applied to the controlled object and that the object can be controlled in a low driving voltage and that simple motion control is applied by digital controlling and that the degrees of freedom in motion of the object can be chosen by the number of the stepper plate and that only single voltage is needed for driving the micromirror motion. With many advantages, the multi-step microactuator provides a solution to overcome the difficulties in controlling multi-step motion.
Owner:STEREO DISPLAY
High-strength and high-hardness ceramic gum abutment
ActiveCN111807865AGood biocompatibilityIncrease connection forceImpression capsAdditive manufacturing apparatusFiberMetal free
The invention belongs to the technical field of ceramic teeth, and relates to a high-strength and high-hardness ceramic gum abutment. The ceramic gum abutment is prepared from, by weight, 90 to 110 parts of zirconium oxide powder, 60-90 parts of titanium dioxide, 20 to 50 parts of aluminum oxide fibers, 0.2 to 1.0 part of ferric oxide, 0.1 to 2.0 parts of a dispersant, 20 to 50 parts of light-cured resin, 0.1 to 0.5 part of a photoinitiator, 0.1 to 3.0 parts of an adhesive, 0.5 to 5.0 parts of a coloring agent, 0.5 to 1.0 part of a pore-forming agent and 500 parts of a solvent; and the particle size of the zirconium oxide powder ranges from 100 nm to 500 nm, the particle size of the titanium dioxide ranges from 400 nm to 1000 nm, the diameter of the aluminum oxide fibers ranges from 50 nmto 200 nm, and the length of the aluminum oxide fibers ranges from 10 [mu]m to 200 [mu]m. According to the high-strength and high-hardness ceramic gum abutment, the surface of the ceramic gum abutmentis pure white and free of metallic luster, the surface is free of cracks in the machining process, the service life of the gum abutment is long, and safety is good.
Owner:嘉兴饶稷科技有限公司
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