NA 099
DIN Standards Committee Steel Wire and Wire Products
Standards
[CURRENT]
DIN 21605
DIN 21605
Auxiliary ventilation for mining - Flexible plastic ventilation ducts for exhaust and forced ventilation - Spiral ventilation ducts
Title (German)
Sonderbewetterung im Bergbau - Wetterlutten aus faltbarem Kunststoff für saugende und blasende Bewetterung - Spirallutten