The dust valve cancels a rubber plate on the existing valve plate, but USES a hollow rubber ring. The regulating screw is used to regulate the dip Angle of the valve plate.
2
股骨干骨折予钢板螺丝钉内固定或逆向交锁髓内钉固定,股骨颈予三枚空心加压螺丝钉内固定。
Femoral shaft fractures are fixed by plates or reverse locking internal medullary nails, femoral neck fractures are fixed by three cannulated cancellous screws.
3
公司主要生产铜、铁、不锈钢半空心铆钉、螺丝、螺帽及非标准件、五金配件等。
The company mainly produces copper, iron and stainless steel semi_hollow rivets, solid rivets, screws, nuts and nonstandard parts and hardware.