控制主机做为系统的控制和综合判断中心，利用RS-485通信线与PLC进行通信，实现现场设备的实时监控。
The master computer is used as the centre of control system and synthetic judgment, and is connected with PLC by RS-485 communication line to perform real-time monitoring on local apparatus.
我上了线，屏住呼吸，直到听见三个小小的字：“你有信。”
I go 5 online and my breath catches in my chest until I hear three little words, "You've got mail."
在屏幕上输入一张便条或一封信，然后通过电话线把它传给另一个人，这样就能将通讯费用减到最低程度。
You type a note or a letter on your screen and then you send it down the telephone line to another person for as little as it costs you to call your service provider.
应用推荐