“penetration speed”的概念、定义、翻译、参考文献-科学参考

单词	penetration speed
释义	penetration speed [´pen·ǝ`trā·shǝn ´spēd] ^{MECHANICAL ENGINEERING} The speed at which a drill can cut through rock or other material.
随便看	mine ventilation system mine water miniature electron tube miniaturization minicartridge minicell minichromosome minicomputer minidisk minifloppy disk minim minimal brain dysfunction syndrome minimal equation minimal flight path minimal-latency coding minimal polynomial minimal realization minimal recognition length minimal surface natrophilite natural abundance natural aging natural antenna frequency natural arch natural asphalt

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