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Open tighten the screws , open the plug, cut metal thread , link wire head , closed switch , tighten the screws , it's not making a robot , it’s just people change a plug when plug can`t work. Easy change plugs, using a simple opening and closing devices , simplifying the process of opening and closing plugs , simplify the process of connection wires through biting the skin of wires.
Hua Cao Tuo Wang Mengdi Shi Tao Hu