The main components have impeller, pump shell and the seal device.
主要部件有叶轮、泵壳和轴封装置。
A new technology and device for measuring clearance of steam seal gland has been presented.
介绍一种测量汽封间隙的新工艺及装置。
The device can move the seal part from the bottom hole to the wellhead.
该工具将密封部位由井底移至井口，适用于各种规格的大直径套管固井。
The device can move the seal part from the bottom hole to the wellhead.
该工具将密封部位由井底移至井口，适用于各种规格的大直径套管固井。
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