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词汇
deep mining of coal pillar
释义
deep mining of coal pillar
基本
例句
深部开采
Most of large and middle scale open-pit mines in China have reached deep mining.
摘要我国的大多数大中型露天矿山已经或即将进入深部开采。
随便看
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更新时间:2025/5/29 8:12:03