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单词
firedamp-drainage drill
释义
firedamp-drainage drill
firedamp-drainage drill
[
′fīr‚damp ‚drān·ij ‚dril
]
(mining engineering)
A heavy, compressed-air-operated, percussive, rotary or rotary-percussive drilling machine for putting up the boreholes in firedamp drainage.
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更新时间:2025/1/31 14:54:29