coal deposit hydrogeological drill-hole的意思|示意
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煤矿水文地质钻孔
coal deposit hydrogeological drill-hole的网络常见释义
煤矿床水文地质钻孔 ... eletric coal drill 煤电钻 coal deposit hydrogeological drill-hole 煤矿床水文地质钻孔 Flameproof hand-held electric coal drill 隔爆型手持式煤电钻 ...