... vacuum transformer oil purifier, oil filtration 2.ZYD-Double stages insulating oil purifier, oil treatment, oil purification 3.ZYM-Mobile/trailer type transformer oil treatment, oil filtration machine 4 ... resistant oil purifier, oil filtration machine 9.JZS-Engine oil regeneration system, waste oil recycling 10.BZ-Transformer oil regeneration device, oil purifier 11.PF-Plate pressure oil filter, oil ...