At present the most economical convenience method is spreading fire protection coating to the steel structure.

目前，最经济方便的方法就是对钢结构涂覆防火涂料。

youdao

At present the most economical convenience method is spreading fire protection coating to the steel structure.

目前，最经济方便的方法就是对钢结构涂覆防火涂料。

youdao