main sewer meaning in English

排水总管
污水干管
污水主管

In a joint effort of the epd , the drainage services department and the public , many village houses , residential blocks and commercial complexes in the sham tseng area have been connected to the public sewers . currently some sewerage works along castle peak road are in progress . once the main sewer trunks are completed in 2009 , the epd will ask owners of village houses and other buildings to connect to the public sewer as soon as possible
深井一带大部份的住宅大厦商业楼宇和许多村屋已接驳至公共污水系统，青山公路沿线的污水渠接驳工程亦逐步进行，待至2009年污水主干渠落成后，环保署亦会要求村屋和其它楼宇业主尽快将污水接入公共污水渠。