BS 561:1951

Specification for alternating-current line relays double-element 3-position (for railway signalling).

NORMA vydána dne 15.6.1951

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Elektronické PDF (3712.90 CZK)

The information about the standard:

Designation standards: BS 561:1951
Note: NEPLATNÁ
Publication date standards: 15.6.1951
The number of pages: 12
Approximate weight : 36 g (0.08 lbs)
Country: British technical standard
Kategorie: Technické normy BS