... pipe chamfering machine 钢管倒棱机，钢管倒角机 pipe closer 管塞 pipe coil 旋管， ...
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... 静压头;压力压头;static head 管堵;head plug;pipe closer 动压头;速度头;kinetic head ...
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But it could escape through imperfect joints in well pipe closer to the surface.
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