短语词组短語ball head insulator 球形接頭絕緣子;球頭形絕緣子;球頭狀絕緣子ball type insulator 球形絕緣子;拉緊絕緣子ball type guy insulator [電]球形拉線絕緣子insulator ball 球形絕緣躰insulator ball guide 球頭定位器 返回 ball insulator