coal underground mining
煤炭井下开采
coal underground mining中文，coal underground mining的意思，coal underground mining翻译及用法
2026-04-12 20:17 浏览次数 19
coal underground mining 例句
英汉例句
as the use of coal underground mining face of electrical equipment and control equipment, must be flameproof or intrinsically safe type equipment.
但是由于在煤矿井下采掘工作面使用的电气设备和控制设备，必须是隔爆型或本质安全型设备。
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