Tianzheng construction TArchTianzheng electrical TElecTianzheng sunshine TSunTianzheng to design drainage TWTTianzheng decoration TDecTianzheng HVAC THvacTianzheng structure TAsdTianzheng municipal pipeline TGXTianzheng municipal road TDL TWT我认为是TANGENT WATER的缩写和简称，他们给出的英文全称是上述的。
