One effective way is preferred pump barrel and plunger of materials and surface treatment processes.
其中一个有效的方法就是优选泵筒和柱塞的材料和表面处理工艺。
The barrel, plunger and standing valve of the pump were designed, improving the barrel's force conditions and reinforcing the screw thread's sealing performance and tensile strength.
该泵对泵筒、柱塞、固定阀做了设计，改善了泵筒受力状况，提高了螺纹的密封性能和抗拉强度。
A syringe (1) comprises a barrel (2) with a plunger (3) in slidable and sealing engagement therein, and a needle attached to one end of the barrel (2).
一种注射器(1)，包括筒(2)，一柱塞(3)可滑动且密封地接合在该筒中，并且针结合到筒(2)的一端。
A protrusion (56) forming a ridge is disposed on one of the roof of the barrel and the plunger head.
形成脊的突起(56)设在注射筒顶部和柱塞头中的一个上。
A protrusion (56) forming a ridge is disposed on one of the roof of the barrel and the plunger head.
形成脊的突起(56)设在注射筒顶部和柱塞头中的一个上。
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