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screw stem pump
螺杆泵
以上为机器翻译结果，长、整句建议使用 人工翻译 。
When screw pump works, the stem can not only influence by the force of tension stress but also the shearing stress which makes it to be failure easily if the design is not good or monitor is poor.
螺杆泵工作时，杆柱不但受到拉应力，而且受到剪应力。如果设计不当或使用中监测不力，螺杆泵很容易发生故障。
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