... power rectifiers for coal mining machinery Product usageSuitable for plating hydrocylinder, mold, plate making, coal mining machinery, roller, screw, piston rings and other ... precision is high, the stability is good;6.The device of frame type structure , after spray craft processing, ... air cooled or Water cooled or Oil cooledwater quality Deionized water or Running water,PH:7~8 Water pressure:0.1~ ...