CNS 11177-1989 Hoses Nozzles Nozzle Valves and Hoses Reel for Moveable Carbon Dioxide Halon and Dry Chemical Power of Fire Extinguise《移动式二氧化碳、卤化烷及干粉等灭火设备用橡皮管、喷嘴、喷嘴开关阀及橡皮管轮盘》.pdf

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