亚洲日韩欧洲无码a∨夜夜,免费VA欧美成人高清视频,熟女少妇色综合图区,大香网伊人久久综合网AV

排水用檢查井主要由井蓋、井蓋座、井筒、井室等部分組成。井筒及井室壁設(shè)置有供維修人員上下的踏步；井室體設(shè)置有進出水支管接口；污水井的井座一般設(shè)置有供水匯流的流槽，便于污物排放順暢；雨水井的井座一般設(shè)置有供管道中泥沙沉淀的沉泥室，方便后期清理維護。

Inspection well for drainage mainly consists of well cover, well cover seat, well bore, well chamber and other parts. The well bore and the wall of the well chamber are provided with steps for the maintenance personnel to go up and down; the well chamber body is provided with the inlet and outlet branch pipe interface; the well seat of the sewage well is generally provided with a flow channel for water supply confluence, so as to facilitate the smooth discharge of pollutants; the well seat of the rain well is generally provided with a mud chamber for sediment deposition in the pipeline, so as to facilitate the later cleaning and maintenance.