短语词组短語petticoat insulator 裙狀絕緣子;[電]裙式絕緣子;裙式隔電子double petticoat insulator 雙裙絕緣子;繙譯multi -petticoat insulator 多裙式絕緣子petticoat of insulator 絕緣子外裙double petticoat porcelain insulator 雙裙瓷絕緣子 返回 insulator petticoat