线(Xian)芯(Xin)线(Xian)芯(Xin)是(Shi)电(Dian)力(Li)电(Dian)缆(Lan)的(De)导(Dao)电(Dian)部(Bu)分(Fen)，(?)用(Yong)来(Lai)输(Shu)送(Song)电(Dian)能(Neng)，(?)是(Shi)电(Dian)力(Li)电(Dian)缆(Lan)的(De)主(Zhu)要(Yao)部(Bu)分(Fen)。(?)绝(Jue)缘(Yuan)层(Ceng)绝(Jue)缘(Yuan)层(Ceng)是(Shi)将(Jiang)线(Xian)芯(Xin)与(Yu)大(Da)地(Di)以(Yi)及(Ji)不(Bu)同(Tong)相(Xiang)的(De)线(Xian)芯(Xin)间(Jian)在(Zai)电(Dian)气(Qi)上(Shang)彼(Bi)此(Ci)隔(Ge)离(Li)，(?)保(Bao)证(Zheng)电(Dian)能(Neng)输(Shu)送(Song)，(?)是(Shi)电(Dian)力(Li)电(Dian)缆(Lan)结(Jie)构(Gou)中(Zhong)不(Bu)可(Ke)缺(Que)少(Shao)的(De)组(Zu)成(Cheng)部(Bu)分(Fen)。(?)屏(Ping)蔽(Bi)