bitumen n insulation 沥青绝缘

insulation n layer 保温层

Insulation n resistance test 绝缘电阻测试

insulation n 绝缘体

insulation n mat 因色累熏隔热垫

insulation n quilt 保温毡

insulation n sleeve 绝缘套管

insulation N-UNCOUNT 隔绝

insulation n materials 绝缘材料