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It consist of two parts, one is the plug and another is the socket. Sometime people use an electrical plug may encounter electricity when touch metal parts lead to electric shock hazard. Security socket add a protection cover in the plug.
Xiaowei Wu，Caixiang Ding，Rufeng Dai，Ziyun Yan，Dunqi Lu，Wenjie Zhang，Dawei Pan，Huanghao Jin，Qionglei Zhu