DIN EN 16475-3:2016
烟囱 附件 第3部分:通风调节器、静止开启装置和组合二次空气装置 要求和测试方法;德文版 EN 16475-3:2016
Chimneys - Accessories - Part 3: Draught regulators, standstill opening devices and combined secondary air devices - Requirements and test methods; German version EN 16475-3:2016