
Air regulation systems for mining - Travel-way air locks with pressure-relief air doors.
STANDARD published on 1.6.2019
Designation standards: DIN 21639:2019-06
Publication date standards: 1.6.2019
The number of pages: 8
Approximate weight : 24 g (0.05 lbs)
Country: German technical standard
Category: Technical standards DIN
Wetterbauwerke für den Bergbau - Fahrwegschleusen mit druckentlasteten Wettertüren.