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Hot Sale Q11f-16t Brass Threaded Ball Valve DN15 DN20, Bsp/NPT, for Transformer Oil Sampling & Small Drain, Find Details and Price about Ball Valve Transformer Ball Valve from Hot Sale Q11f-16t Brass Threaded Ball Valve DN15 DN20, Bsp/NPT, for Transformer Oil Sampling & Small Drain - Hebei Chijiang Import and Export Co., Ltd.