-Electrical equipment used a pole with a cable, insert the screw head Terminal type machine, compressor. Do not use wires, screw the dormant period, thousands.
- Electrical connector with a screw cable clamp, insert the Terminal type milling machine facilities. Do not use the cord wrapped around the screw again.
Electrical equipment used a pole head screw anchor line, put Terminal type machine tools and everywhere. Do not use wire wrapped around the screw in the cold.