... S9, SZ9,SFZ9,SSZ9,SFSZ9,S10,SFZ10 and SFSZ10 series oil-immersed transformer ,with voltage class 10--110KV, and capacity 30--90000KVA ... be made with excellent performance,low loos,lower noise, and oil leakage shall be avoided. The products have passed the 2002 ... the Ministry of Electric Power and Machine Building jointly. The oil vacuum purification plants are our patent products and had been ...