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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