shallow open-cut surface mining
... cut surface mining 浅部露天开采 shallow open-cut surface mining 浅部露天开采 cut and fill mining 充填开采 ...
基于18个网页-相关网页
... cut surface mining 浅部露天开采 Surface Mining Systems 露天采矿系统 office of surface mining 地煤采矿处 ...
基于8个网页-相关网页
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