给电动伸缩门安装接地线：
Install grounding wire for electric telescopic door:
有很多电动伸缩门用户或者安装师傅为了方便，一般不会接地线，只是接通电源线的火线和零线，这样一旦出现电源线老化引起破裂，接触到电动伸缩门门体，容易发生危险，如果有接地线，将漏的电卸载到大地上，会比较安全。
There are many users or installers of electric telescopic doors. For convenience, they usually do not have grounding wires, but only connect the fire wires and zero wires of the power wires. In this way, once the aging of the power wires causes rupture and contacts the electric telescopic door body, it is easy to cause danger. If there are grounding wires, it will be safer to unload the leakage electricity to the earth. All.