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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
B61L5/02—Mechanical devices for operating points or scotch-blocks, e.g. local manual control
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FR982635D1949-01-191949-01-19Perfectionnements aux aiguilles pour voies ferrées
ExpiredFR982635A
(fr)