BS 2733:1956

Specification. Intrinsically safe magneto-call telephones primarily for use in coal mines.

NORMA vydaná dňa 14.3.1956

The information about the standard:

Designation standards: BS 2733:1956
Note: NEPLATNÁ
Publication date standards: 14.3.1956
Approximate weight : 300 g (0.66 lbs)
Country: British technical standard
Kategória: Technické normy BS