15 ก.ค. 2016 PREVENTIVE MAINTENANCE Kai ELECTRICAL WORK, PREVENTIVE MAINTENANCE No comment ACB.Testing Grounding Testing Contact Resistance Hight Voltage Cleaning Hipot Testing Insulation Testing Low Voltage Cleaning Preventive Maintenance MCC Relay Testing Transformer Testing Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Google+ (Opens in new window) Related