Large caliber card swiping prepaid water meter (RF card)

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Large caliber prepaid water meter (nominal diameter 40mm~300mm), hereinafter referred to as "large caliber prepaid water meter", is a water metering instrument with settlement function composed of a nominal diameter 40mm~300mm rotor wet cold water meter with a signaling device as the measuring base meter, an RF card as the information carrier, and a control box and an electric control valve installed.