Contractor: Foshan Power Supply Bureau of Guangdong Power Grid. 1Designing unit: Guangdong Electric Power Design and Research Institute. 1Subcontractor. Shenzhen Branch, No. 1 Power Supply Bureau of GuangdongPower Grid. It was produced by CSTC in 2006.Our top leaders monitored the manufacturing process and product qualityin person to ensure timely completion of the project, which has won goodpraises from proprietor, supervision unit and subcontractors.