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summary
Specification for alternating-current line relays double-element 3-position (for railway signalling). | Status: Withdrawn
Details
Publisher
BS
File size
282.05 KB
Pages
12
Format
PDF
Publication date
1951-06-15
ISBN-13
978-0-580-00667-8
ISBN-13 plain
9780580006678
ISBN-10
0580006670