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B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
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FR971315D1947-09-101948-09-08Dispositif de transmission pour aiguilles manoeuvrées électriquement
ExpiredFR971315A
(fr)