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单词
single-hand drilling
释义
single-hand drilling
single-hand drilling
[
′siŋ·gəl ‚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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更新时间:2025/3/22 2:19:03