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BS 1659:1950
M00000521
New product
BS 1659:1950 Specification for tractive armature direct current neutral track and line relays for railway signalling
standard by BSI Group, 07/26/1950
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Full Description
Relays for 2, 4 or 6 contact-arms. Overall dimensions, electrical tests, performance. Positioning and marking of terminals.Cross References:
BS 442