
Notes of the use of Ringelmann and miniature smoke charts. The calibration of instruments in Ringelmann number.
NORMA vydaná dňa 27.6.1972
Designation standards: BS 2742:ADDENDUMNO.1:1972
Note: NEPLATNÁ
Publication date standards: 27.6.1972
The number of pages: 8
Approximate weight : 24 g (0.05 lbs)
Country: British technical standard
Kategória: Technické normy BS