Draft Document - Chimneys - Design, installation and commissioning - Part 2: Chimneys and connecting flue pipes for room sealed combustion appliances; German and English version prEN 15287-2:2021
文件草案——烟囱——设计、安装和调试——第2部分:房间密封燃烧设备用烟囱和连接烟道管;德文和英文版本prEN 15287-2:2021