main ends


  • 翻译:旨备开采工祖

同义词

1)main ends,旨备开采工祖2)long face mining,长工祖开采3)hand won face,手工开采工祖4)continuous face mining,连续工祖开采5)long face system,长工祖开采法6)coal wall,采煤工祖

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