295results about How to "Won't block" patented technology

The invention discloses an aortic-arch covered stent-graft, which comprises an aortic stent-graft and three branch artery stent-grafts, wherein a sunk part is arranged in the aortic stent-graft and comprises a left-side wall close to a proximal end, a right-side wall far away from the proximal end and a bottom wall for connecting the left-side wall with the right-side wall; two openings are arranged on one side wall in the left-side wall with the right-side wall of the sunk part, and one or two openings are arranged in the other side wall; an inner chimney graft with a caliber comparative with the openings is fixedly arranged in each opening; and the branch artery stent-grafts are respectively arranged in the chimney grafts. The stent-graft system with the structure can isolate aortic lesions involving the aortic arch and the ascending aorta and reconstruct the blood flow of branch arteries, is suitable for various normal and changing blood vessels, has a wide range of application, avoids customized stents, and can be in mass production. The time is effectively saved, and the operation is easy.

The invention relates to a self-cementing chemical plugging agent for well drilling and a preparation method thereof. Using bauxite, limestone and gypsum as raw materials, according to the mass ratio of 20-40 parts of bauxite, 30-60 parts of limestone, and 10-30 parts of gypsum, the intermediate product is fired at 1000-1500 °C, and the intermediate product is Grind, then mix with gypsum, limestone and quartz sand according to the mass ratio of 60-90 parts of intermediate products, 5-15 parts of gypsum, 5-20 parts of limestone, and 5-15 parts of quartz sand to obtain cemented chemical plugging agent products. The plugging agent has rich raw materials, low cost, simple preparation method and easy implementation, and its plugging effect is better than that of existing chemical plugging agents. It has wide applicable temperature range, fast plugging speed, strong pressure bearing capacity and is suitable Advantages of oil layer plugging.

contactless connector. Provides a contactless connector that ensures communication continuity. The non-contact connector includes a rotating side light element on a rotating body that rotates around a rotating shaft and a fixed side light element on a fixed body that is fixed in position; moreover, the rotating body includes a reflector that rotates around the rotating shaft. The two optical elements are constructed such that an optical path is formed between the specific fixed side optical element when the two optical elements are located on the optical line section on which light emitted from the specific rotation side optical element Light is reflected by the reflector. The reflector rotates at half the rotational speed of the rotating body.

The invention discloses a clothes treating device. The clothes treating device comprises a control panel base, a clothes input opening and an upper cover, wherein the clothes input opening is formed in the control panel base and used for taking and inputting clothes, and the upper cover is located above the clothes input opening and connected with the control panel base and is capable of being overturned backwards so as to uncover the clothes input opening. A display screen is arranged on the portion, behind the clothes input opening, of the control panel base, an observation area is arrangedon the upper cover and used for observing the rear display screen from the front of the upper cover in the uncovering state, control areas for controlling the clothes treating device are arranged on the front side and / or the lateral side of the display screen, the control areas and the display screen form a control panel, and an operation area capable of operating the control areas from the frontof the upper cover in the uncovering state is arranged on the upper cover. According to the clothes treating device with the rear control panel, under the conditions that the upper cover is closed andopened, the operation on the clothes washing procedure can be achieved, and under the condition that the upper cover is opened, the display conditions of the control panel can be observed through a transparent window.

In a two-stroke engine including a scavenging port (43b) having an open end (42d) opening out in a side wall of the cylinder bore (3a) and communicating with a crank chamber (2a), the open end being configured to be closed and opened by the piston (22), a fuel injection device (71) is mounted on the engine main body so as to inject fuel onto a back side of the piston and / or a part of the side wall of the cylinder bore located under the piston via the open end of the scavenging port or via the open lower end of the cylinder bore. The fuel deposited on the surfaces of the piston and the cylinder inner wall promotes the cooling of such parts.