Specification for aircraft material. ´20´ carbon steel (suitable for welding) (25/35 tonf/sq in: maximum size 6 inches diameter or minor sectional dimension).
NORMA vydaná dňa 31.1.1964
Designation standards: BS 5S21:1964
Note: NEPLATNÁ
Publication date standards: 31.1.1964
The number of pages: 6
Approximate weight : 18 g (0.04 lbs)
Country: British technical standard
Kategória: Technické normy BS