1)fountain equipment [public works category],喷水池装置(公共工程类别)2)electrical installations [public works category],电器装置(公共工程类别)3)fire services installations [public works category],消防装置(公共工程类别)4)supply and installation of water treatment plant [public works category],供应及装置滤水器(公共工程类别)5)industrial type electrical installations [public works category],工业类电器装置(公共工程类别)6)supply and installation of pumpsets and associated pipework [public works category],供应及装置抽水系统及相连的水管工程(公共工程类别)