35results about How to "Reduced operating proficiency requirements" patented technology

The invention discloses a device for automatically unscrewing multiple screws on a switch. The device comprises a switch fixing base, a screw unscrewing device and a driving device. A fixing groove is formed in the switch fixing base. The screw unscrewing device comprises a support, a driving shaft and at least one driven shaft. The driving shaft is rotationally connected with the support through a bearing. The driven shafts are rotationally connected to the support and can move along the axes of the driven shafts. A driving gear is fixed to the driving shaft. Driven gears are fixed to the driven shaft and used for being engaged with the driving gear. The lower end of each driven shaft is provided with a screwdriver bit stretching into the fixing groove. The support is in sliding connection with the switch fixing base. The driving device controls the screw unscrewing device to operate. The device has the advantages that the purpose of unscrewing the screws arranged on the same face of one switch simultaneously is achieved, labor efficiency is effectively improved, the driving device controls the screw unscrewing device to move, and it is ensured that the numbers of rotating circles of the driven shafts are consistent, so that the unscrewing heights of all the screws are unified, and the requirement for the degree of proficiency of worker operation is also greatly lowered.

The embodiment of the present application discloses a graphics adjustment method, device, device and storage medium, which relate to the technical field of electronic whiteboards, and include: displaying graphics on a canvas; displaying a first writing track in response to a first writing operation received, The first writing track represents a target geometric attribute, and the target geometric attribute includes a length parameter and / or an angle parameter; the graphic is adjusted so that the target geometric attribute is the geometric attribute of the adjusted graphic. The above-mentioned method can solve the technical problem in the prior art that graphics cannot be adjusted accurately and simply.

The invention relates to a method for quantitatively analyzing maleic anhydride, thiourea and thiomalic acid simultaneously. The method comprises the steps of: (1) taking by weighing maleic anhydride, thiourea and thiomalic acid standard substance, preparing a standard solution; (2) taking maleic anhydride, thiourea and thiomalic acid The mixture formed is the test sample, and the test sample solution is prepared; (3) get the standard solution and the test sample solution respectively for high-performance liquid chromatography analysis, conditions: C18 liquid chromatography column, column temperature 25~45 ℃, flowing Phase methanol and phosphoric acid aqueous solution, the flow rate is 0.5-2.0mL / min, the detection wavelength of the ultraviolet detector is 200-235nm, and the content is obtained by the external standard method; the sequence of steps (1) and (2) is not limited. The method can quickly and simultaneously quantitatively analyze the contents of maleic anhydride, thiourea and thiomalic acid, and has high sensitivity, accuracy, stability and reproducibility.