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单词
mole mining
释义
mole mining
mole mining
[
′mōl ‚mīn·iŋ
]
(mining engineering)
A method of working coal seams about 30 inches (75 centimeters) thick; a small continuous-miner type of machine is used, which is remote-controlled from the roadway, without associated supports.
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更新时间:2025/1/31 1:55:07