时间：
2017
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03
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29
Steel/iron case gas meters integrated with functions like prepayment, automatic charging, holding of data, recovery and encryption are designed for gas users. Such gas meters are internally equipped with explosion-proof electric machinery valve, and featured by wide range, high accuracy and super safety. They can calculate gas fee based on a five-tiered pricing structure. They consume low power but their functions are stable. They are easy to use, reliable and durable.