英语词汇“mine roofs, mine floor, shaft lining mining”的翻译、意思、用法、释义-英汉汉英双解词典-爱贷网

词汇	mine roofs, mine floor, shaft lining mining
释义	mine roofs, mine floor, shaft lining mining 固定建筑物矿井顶板、矿井地面、竖井衬砌开采
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