sublevel open stope method分段: section; segmentation; burst ...无: not have; there is not; be w ...充填: filling; stowing; backfillin ...工: worker; workman; the working ...祖: grandfather下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:分段无充填工祖采矿法，即可在微信中查询翻译
