Current Transformer, Energy Meter Calibration, Power Quality Analyzer manufacturer / supplier in China, offering Gfuve 0-1800ω 4/3/2 Pole Ground Pile Resistance Test Clamp T-3730, Gfuve Ground Pile Resistance Test Clamp T-3730, T-100kv Portable High Voltage Withstand Voltage Test Tester From 0 to 100kv AC and 140kv DC and so on.