wooden-box drain 木箱式排水沟

drain box 泄水箱 ; 废液回收箱 ; 排放箱

stuff box drain tank 填料函滑油泄放柜

drain hat-box 泄水井

Drain wooden box 木箱暗沟

Drain pump control box cover 顶盖排水泵控制箱

Concrete drain box 混凝土排水箱