泥浆泵座中装有四只骨架油封和轴套，防止轴磨损，延长轴的使用寿命。
Mud seat is equipped with a four skeleton oil seal and the sleeve to prevent shaft wear and tear, extending the service life of shaft.
坐封的时候，从地面进行投球，然后，开泵驱替循环，直至投球坐入球座。
A ball is then dropped from the surface and pumped down until it seats on the tool.
它是一座水压控制的桥梁，利用蒸汽来驱动巨大的泵。
It was a hydraulically operated bridge, using steam to power the enormous pumping engines.
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