欧美成人午夜_欧美少妇免费精品_亚洲AV成人无码网在线看_日韩 国产 黄色_黄色在线播放国产_99在线公开免费视频_日本成片免费高清_精品国产一区二区三区久久91_a级无码午夜福利_新婚娇妻被注入春药

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(jìn)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(hù)。

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.