NA 060
DIN Standards Committee Mechanical Engineering
Standards
[Withdrawn]
DIN 21606
DIN 21606
Auxiliary ventilation in mining; flexible plastic air ducts for forced ventilation; flat air ducts
Title (German)
Sonderbewetterung im Bergbau; Wetterlutten aus faltbarem Kunststoff für blasende Bewetterung; Flachlutten