The upward horizontal slice stoping and filling without intervening pillar is the main mining method in Huangshaping Pb-Zn Mine.是什么意思_The upward horizontal slice stoping and filling without intervening pillar is the main mining method in Huangshaping Pb-Zn Mine.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句