BS 561:1934

Alternating-current line relays (2-element, 3-position) for railway signalling purposes..

NORMA vydána dne 23.7.1934

The information about the standard:

Designation standards: BS 561:1934
Note: NEPLATNÁ
Publication date standards: 23.7.1934
Approximate weight : 300 g (0.66 lbs)
Country: British technical standard
Kategorie: Technické normy BS