“hollow drill”的概念、定义、翻译、参考文献-科学参考

单词	hollow drill
释义	hollow drill [`häl·ō `dril] ^{DESIGN ENGINEERING} A drill rod or stem having an axial hole for the passage of water or compressed air to remove cuttings from a drill hole. Also known as hollow rod; hollow stem.
随便看	pound per square inch Pound-Rebka experiment pounds per square inch absolute pounds per square inch differential pounds per square inch gage Poupart's ligament pour depressant pouring pouring rope pour-plate culture pour point pour-point depressant pour-point inhibitor pour reversion pour stability Pourtalesiidae pour test powder powder avalanche powder box powder clutch powder diffraction camera powdered-iron core powder flowmeter powder house

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