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MID DN15 DN20 DN40 Nb-IoT 4G Lorawan RS485 Brass Body Smart Ultrasonic Water Meter for Smart City IoT, Find Details and Price about Hot Ultrasonic Water Meter Potable Ultrasonic Water Meter from MID DN15 DN20 DN40 Nb-IoT 4G Lorawan RS485 Brass Body Smart Ultrasonic Water Meter for Smart City IoT - NINGBO XINGHANG METER TECHNOLOGY CO., LTD.