... plants, power stations, power companies, metallurgy, petrifaction, machinery, traffic, railways etc. Especially for on site transformer ... about 720 hours. 6. High autoimmunization: adopt PLC full automatic system, operate by touching screen, with dynamic display ... Series EFD Explosion Protection Purifier10. Series IIJ-II Zhongneng Automatic Insulating Oil Tester (oil filtration, oil purification, oil ...