O級(jí)絕緣 o insulation: 絕緣class a insulation: 甲類絕緣class insulation: 絕緣材料class of insulation: 絕緣等級(jí)insulation class: 絕緣等級(jí),絕緣種類; 絕緣種類絕緣等級(jí)下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯