Power assisted air gates - Travel-way air locks - Type doors with pressure.
STANDARD published on 1.9.1999
Designation standards: DIN 21639:1999-09
Note: WITHDRAWN
Publication date standards: 1.9.1999
The number of pages: 3
Approximate weight : 9 g (0.02 lbs)
Country: German technical standard
Category: Technical standards DIN
Wetterbauwerke für den Bergbau - Fahrwegschleusen - Druckentlastete Wettertüren.