http://www.relay-tester.com/Portable Contact Resistance Tester factory Our History Wuhan Relay Electric Technology Co., Ltd. was established in 2010. The company's R&D team has grown from 2 following insurance products, the company product has covered relay protection tester, transformer comprehensive test instrument, resonance device, battery tester and so on electric power instrument of each classification, the product is complete, high stability, high precision, and all products in the upgrade, at the
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