labor intensity of coal mining
labor intensity of coal mining
煤矿开采劳动强度
以上为机器翻译结果,长、整句建议使用 人工翻译 。
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Hydraulic coal mining offers the merits of being simple in process, high in adaptability, less in labor intensity and easy in management.
水力采煤具有工序简单、适应性强、劳动强度小、便于管理等优点。
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