还要着重检查密封槽的情况。
介绍一种测量抽油杆减振器柱塞密封槽深度的测量工具。
An easy tool for measuring the depth of sealing groove is devised.
在杯体上口端面上所设置的密封槽、密封圈,具有很好的密封效果。
The sealing trough and the sealing ring arranged on the head face of the upper mouth of the cup body have good sealing effect.
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