The pipe operation has failed because the other end of the pipe has been closed.
因已关闭管道操作的另一端而使管道操作失败。
In the pipe, the pressure consists of three parts of fluid dynamic, pipe operation pressure and fluid density pressure.
流体的液动力和管路工作压力及液体密度引起的压力三者叠加而形成管内压力。
One machine with multi-pipe operation, Where three sets of air exhaust or are fixed and used independently or parallelly.
一机多管作业，本机装有三套抽气头，可单独或并联使用。
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