Fans - Efficiency classification for fans - Part 4: Driven fans at maximum operating speed (ISO/DIS 12759-4:2018); German and English version prEN ISO 12759-4:2018
Fans - Efficiency classification for fans - Part 4: Driven fans at maximum operating speed (ISO 12759-4:2019); German version EN ISO 12759-4:2019— 34 стр.