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Factory Direct Residential DN20 3/4" with Automatic Shut-off Valve Lorawan RS485 Remote Reading Cold Ultrasonic Water Meter, Find Details and Price about Smart Ultrasonic Water Meter Valve Control Ultrasonic Water Meter from Factory Direct Residential DN20 3/4" with Automatic Shut-off Valve Lorawan RS485 Remote Reading Cold Ultrasonic Water Meter - NINGBO XINGHANG METER TECHNOLOGY CO., LTD.