分流制改造
reconstruction of separate drainage system
股份制改造
shareholding reform
Share holding reform
share system refo
reformming for stock system
stock holding system reform
stake-cooperative system reform
控制网改造
Control network reconstruction
控制网的改造
Reconstruction of the control network
电气控制改造
the innovation of electrified control
PLC控制网改造
PLC control net reconstruction