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单词
tripod drill
释义
tripod drill
tripod drill
[
′trī‚päd ‚dril
]
(mechanical engineering)
A reciprocating rock drill mounted on three legs and driven by steam or compressed air; the drill steel is removed and a longer drill inserted about every 2 feet (61 centimeters).
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更新时间:2026/1/14 3:46:17