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900X Fire Emergency Shut-off Valve|DN20-DN600 Pn16/25, Domestic/Fire Water Parallel System, GB 5135.6 Certified, Ductile Iron, Find Details and Price about Emergency Closing Valve 900X Fire Shut-off Valve from 900X Fire Emergency Shut-off Valve|DN20-DN600 Pn16/25, Domestic/Fire Water Parallel System, GB 5135.6 Certified, Ductile Iron - Gaote Holdings Group Co., Ltd.