underhand stoping：下向梯段回采

underhand stope 下向梯段工祖 | underhand stoping 下向梯段回采 | underhang lining 吊框支柱

underhand stoping：下行梯段回采法

underhand stopes 俯采工作面 | underhand stoping 下行梯段回采法 | underhand work 下向采掘

underhand stope：下向梯段工祖

underground working 地下開(kāi)采 | underhand stope 下向梯段工祖 | underhand stoping 下向梯段回采

underhand stope：下向回采

underhand single stope 下向單翼回采工作面 | underhand stope 下向回采 | underhand stope bench 下向回采梯段

underhand stopping：下向梯段回采

underground utility 地下管線(xiàn) | underhand stopping 下向梯段回采 | underlie angle 與法線(xiàn)構(gòu)成的偏角

bottom stope：下向梯段工祖

bottom slice 底分層 | bottom stope 下向梯段工祖 | bottom stoping 下向梯段回采

underhand stope：下向回采

underhand single stope ==> 下向單翼回采工作面 | underhand stope ==> 下向回采 | underhand stope bench ==> 下向回采梯段

underhand stope bench：下向回采梯段

underhand stope ==> 下向回采 | underhand stope bench ==> 下向回采梯段 | underhand stopes ==> 俯采工作面

underhand double stope：下向雙翼回采工作面

underhammer ==> 下置式擊錘 | underhand double stope ==> 下向雙翼回采工作面 | underhand longwall ==> 下向梯段式長(zhǎng)壁回采

underhand single stope：下向單翼回采工作面

underhand polish ==> 人工研磨 | underhand single stope ==> 下向單翼回采工作面 | underhand stope ==> 下向回采