... telescopic tube 伸缩管 telescopic tubing 伸缩套管 telethermoscope 遥测温度计 ...
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telescopic tubing sub [油气] 油管伸缩短节
tubing telescopic unit 管柱伸缩器
The structure, work principle and application of tubing telescopic unit is introduced.
简要介绍了管柱伸缩器的结构、工作原理及用途。
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