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BS 561:1934 | 23 Jul 1934 | BSI Knowledge
Standard
Withdrawn
BS 561:1934
Alternating-current line relays (2-element, 3-position) for railway signalling purposes.
Published:
23 Jul 1934
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Withdrawn:
Date not available
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Product Details
Descriptors
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ICS Codes
29.120.70 Relays
29.280 Electric traction equipment
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BSI