negative well bore pressure
... well bore shrinkage 井眼收缩 negative well bore pressure 筒负压 full open well bore 全开井筒 ...
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而自动络筒机的顺利工作离不开一个稳定的负压系统。
And the automatic winding machine cannot work without the stable negative-pressure system.
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恒定的吸风负压使纱线能够有效地被吸附，使络筒工序能够平稳地进行。
The stable negative-pressure system can effectively grab the yarn to make the winding process running properly.
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