longwall with caving崩落: talus ruoble; scree; collaps ...式: type; style长: older; elder; senior壁: wall开采: mine; extract; exploit; reco ...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:崩落式长壁开采，即可在微信中查询翻译
