Yielding steel arch support for use in mines. Arched side sections with lower beam. Dimensions
STANDARD published on 1.11.1987
Designation standards: STN 442612
Classification mark: 442612
Catalog number: 63494
Publication date standards: 1.11.1987
The number of pages: 12
Approximate weight : 36 g (0.08 lbs)
Country: Slovak technical standard
Category: Technical standards STN