NA 060
DIN Standards Committee Mechanical Engineering
Standards
[Withdrawn]
DIN 21612
DIN 21612
Auxiliary ventilation for mining; cladding material for flexible airducts; requirements, testing
Title (German)
Sonderbewetterung im Bergbau; Mantelwerkstoff für Wetterlutten aus faltbarem Kunststoff; Anforderungen, Prüfung