天然烟雾和排热通风机规范|沙特标准|SASO-ISO-21927-2
SASO-ISO-21927-2
Smoke and heat control systems – Part 2: Specification for natural smoke and heat exhaust ventilators
烟雾和热控制系统–第2部分:天然烟雾和排热通风机规范
天然烟雾和排热通风机规范|沙特标准|SASO-ISO-21927-2
SASO-ISO-21927-2
Smoke and heat control systems – Part 2: Specification for natural smoke and heat exhaust ventilators
烟雾和热控制系统–第2部分:天然烟雾和排热通风机规范