短語詞組短語base -rock detecting system 根石探測系統(tǒng)Base -rock excavation 基巖開挖Yellow River base rock 黃河根石hard base rock 硬基巖base rock foundation 基巖地基base rock weathering crust 基巖風(fēng)化殼base rock excavation 基巖開挖base rock outcrop area 基巖出露區(qū) 返回 base rock