NA 021
DIN Standards Committee Iron and Steel
Standards
[CURRENT]
DIN 21606
DIN 21606
Auxiliary ventilation for mining - Flexible plastic ventilation ducts for forced ventilation - Flat ventilation ducts
Title (German)
Sonderbewetterung im Bergbau - Wetterlutten aus faltbarem Kunststoff für blasende Bewetterung - Flachlutten