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METHOD OF DIRECT AND CONTINUOUS SWITEHUNG OF TRANSITOR STATION SAFEGUARD SYSTEMS WITH ELECTROMOTIV POINT OPERATING APPARATUS AND LIGHT SIGNALLING DEVICE TO DEFINITIVE RELAY SECURE
METHOD OF DIRECT AND CONTINUOUS SWITEHUNG OF TRANSITOR STATION SAFEGUARD SYSTEMS WITH ELECTROMOTIV POINT OPERATING APPARATUS AND LIGHT SIGNALLING DEVICE TO DEFINITIVE RELAY SECURE