cobblestone drain的意思|示意

卵石排水沟 ... closed drain 闭合式排水,排水暗管 cobblestone drain 卵石排水沟 collector drain 集水沟,集水暗沟 ...

中砾石排水沟 ... cobblestone degeneration 圆石样变性,圆石样变性 cobblestone drain 中砾石排水沟 cobblestone esophagus 鹅卵石样食管 ...

详细翻译 详细翻译>> cobblestone drain 中砾石排水沟..