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单词
longwall system
释义
longwall system
longwall system
[
′lȯŋ‚wȯl ‚sis·təm
]
(mining engineering)
A method of mining in which the faces are advanced from the shaft toward the boundary, and the roof is allowed to cave in behind the miners as work progresses.
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更新时间:2025/8/3 7:36:33