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ZORGE SAFETY RAILWAY EQUIPMENT
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ZORGE SAFETY RAILWAY EQUIPMENT
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Application filed by ZORGE SAFETY RAILWAY EQUIPMENTfiledCriticalZORGE SAFETY RAILWAY EQUIPMENT
Application grantedgrantedCritical
Publication of FR380036ApublicationCriticalpatent/FR380036A/fr
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
B61L5/20—Audible signals, e.g. detonator audible signalling
B61L5/22—Devices for initiating the release of detonators in a certain position of a signal