短語(yǔ)詞組短語(yǔ)caving process zone 崩落過(guò)程區(qū)height of caving zone 垮落帶高度regularly caving zone 規(guī)則垮落帶irregularly caving zone 不規(guī)則垮落帶caving and rock fracture zone 冒裂帶 返回 caving zone