“single-hand drilling”的概念、定义、翻译、参考文献-科学参考

单词	single-hand drilling
释义	single-hand drilling [`siŋ·gǝl ´han `dril·iŋ] ^ENGINEERING A method of rock drilling in which the drill steel, which is held in the hand, is struck with a 4-pound (1.8-kilogram) hammer, the drill being turned between the blows.
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