BS 1745:1951
$86.31
Specification for alternating-current relays for railway signalling: track relays (double-element, 2-position), line relays (single-element, 2-position)
| Published By | Publication Date | Number of Pages |
| BSI | 1951 | 12 |
For circuits not exceeding 250 V. Relays with or without a local element.
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