hand won face,手工开采工祖,同义词,英汉翻译,英汉例句-找单词

hand won face

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