outer thermal insulation

• 外保温

outer thermal insulation的用法和样例：

例句

1. Vacuum ball perlite glassy beads are suitable for all kinds of internal and external wall insulation and household wall, floor and access.
   真空球珍珠岩玻化微珠适合于各种墙体内外保温及分户隔墙，楼层，通道。