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DN20 Brass Cast Iron Wired Photoelectric Direct Reading Water Meter Remote Meter Reading Vertical Installation Mbus RS485 Without Battery, Find Details and Price about Photoelectric Water Meter Water Meter RS485 Modbus from DN20 Brass Cast Iron Wired Photoelectric Direct Reading Water Meter Remote Meter Reading Vertical Installation Mbus RS485 Without Battery - Zhisheng Meijia Technology (Shandong) Co., Ltd.