This article introduces the IC Card Gas Meter Charge system's operation principle including the function, the system construction frame, the hardware architecture, the software flow diagram and so on.
介绍了IC卡煤气表收费系统的工作原理，主要包括其功能、系统结构框图、原理图及其软件流程设计等。
The article analyzes the operation principle of gas roots flow meter and gas turbine flow meter, and summarizes their differences on design selection and installation.
文章分析了气体罗茨流量计与气体涡轮流量计的工作原理，总结了两者在设计选型、安装上的不同。
The article analyzes the operation principle of gas roots flow meter and gas turbine flow meter, and summarizes their differences on design selection and installation.
文章分析了气体罗茨流量计与气体涡轮流量计的工作原理，总结了两者在设计选型、安装上的不同。
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