negative pressure control technology
negative pressure control technology
负压控制技术
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The under-balanced drilling technology is based on how to control the bottom negative pressure which is related to the pressure computation of multiphase flow in annulus .
井底负压值控制是欠平衡钻井技术的基础，而井底负压值的大小与环空多相流的有关压力计算有关。
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