Due to the existence of electric submersible pump Kau, so connected in the pipe thread Department has set up anti-down block.
因电潜泵存在倒扣问题，所以在管螺纹联接处设置了防倒块。
Due to the existence of electric submersible pump Kau, so connected in the pipe thread Department has set up anti-down block.
因电潜泵存在倒扣问题，所以在管螺纹联接处设置了防倒块。
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