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单词
loose ground
释义
loose ground
loose ground
[
′lüs ‚grau̇nd
]
(mining engineering)
Broken, fragmented, or loosely cemented bedrock material that tends to slough from sidewalls into a borehole and must be supported, as with timber sets. Also known as broken ground.
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更新时间:2025/6/1 17:36:35