三种传输方式部分包括RS485、无线gprs、以太网传输，文中分别介绍了这三种通讯方式的工作原理和使用情况。
Three kinds of transmission including RS485, wireless GPRS, Ethernet, the paper introduced the three forms of communication working principle and use.
三种传输方式部分包括RS485、无线gprs、以太网传输，文中分别介绍了这三种通讯方式的工作原理和使用情况。
Three kinds of transmission including RS485, wireless GPRS, Ethernet, the paper introduced the three forms of communication working principle and use.
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