“positive displacement motor drill”的概念、定义、翻译、参考文献-科学参考

单词	positive displacement motor drill
释义	positive displacement motor drill Encyclopedia 理学孔内钻具释 positive displacement motor drill螺杆钻具将钻井循环介质的液压能转化为机械能的容积式孔底动力钻具。简称螺杆钻。
随便看	Potts model Potwar Plateau pot with loop handle pouch pouched animals pouched wave Pouch of Pearls poulaine poultry poultry cannibalism poultry excrement poultry house equipment poultry ingluvies diseases poultry nutrition poultry reproduction POULTRY SCI Poultry Science poultry slaughter quarantine Pounce on Flag pound poundal pounder Pounding Clothes pound net fishing pounds per cubic foot

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