密闭度...

leakproofness的音标：leakproofness的英式发音音标为：[li:kp'ru:fnəs]leakproofness的美式发音音标为：[likp'rufnəs]...

Now generally used PTEE, EPDM and other material for the valve seat, so bubbles leakproofness good.现一般均使用PTEE 、 EPDM等材料,为阀座, 因此,气泡密封性佳.Especially in automobile industry, the leakproofness of cylinder influences the perfo...