class A insulation

消防专业词汇英语翻译(A-C) -亿城英语 ... class A furnace A 类加热炉 class A insulation 甲类绝缘 class A oven A 类灶炉 ...

B级绝缘,B-class... ... ) isolation upgrade 绝缘升级 ) class A insulation A级绝缘 ) medium insulation 中级绝缘 ...