英语词汇“roof support mine roof support for longwall advancing”的意思、用法、释义、翻译、读音、例句、短语、词组-英汉翻译词典

单词	roof support mine roof support for longwall advancing
释义	roof support mine roof support for longwall advancing [固定建筑物] 屋顶支撑，采取长壁开采法的矿井顶部支撑
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