mechanical foam concentrate
... 机械热敏开启装置：mechanically thermal trigger 机械泡沫液：mechanical foam concentrate 机械泡沫系统：mechanical foam system ...
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充气泡沫泥浆由于比重低，液柱压力低，实现了负压钻进，能大幅度提高机械钻进，延长钻头寿命。
The aerated foam mud fluids can used in negative drilling, and enlarge the life of drilling bits for its low density, and low sap pressure.
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