拔插电源插头时，不要用手直接拉拽连接线。
Pull insert plug, font by hand directly pulling connections.
该软件支持两台计算机通过调制解调器拨号连接，也支持两台计算机通过串口对接线直接对接。
This software supports creating connection between two computers both by modem dialing and directly with a serial-port to serial-port line.
钢管不得直接进入接线盒，应通过防爆接头连接。
The steel pipe should not enter the junction box directly, and it should be connected to the box with explosion proof tie-in.
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