drainage

• Water drainage system design at taiping interchange
  太平互通式立交排水系统设计
• Land resumption for drainage works in shui lau hang
  水流坑收地进行排水改善工程
• Someone has to do it : drainage inspection and sewage sampling
  厌恶性工作谁来做
• Cast iron drainage pipes and fittings without sockets
  无承口的铸铁排水管和管件
• Water engineering of agricultural lands ; terms ; drainage
  农业水利工程术语.排水
• Design code of water supply and drainage for substation
  变电所给水排水设计规程
• Vincent chu tun - hon , engineer , drainage services department
  渠务署工程师朱敦瀚
• Drainage improvement in northern hong kong island
  港岛北部雨水排放系统改善计划
• Main drainage channels and poldered village protection scheme
  河道及乡村防洪计划
• Code for design of irrigation and drainage engineering
  灌溉与排水工程设计规范