
En 12237 Ventilation For Buildings - Ductwork - Circular Sheet Metal Air Ducts - Strength And Leakage - Requirements And Testing
出版:British Standards Institution

专家解读视频
En 12237 Ventilation For Buildings - Ductwork - Circular Sheet Metal Air Ducts - Strength And Leakage - Requirements And Testing
出版:British Standards Institution
专家解读视频