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J CARPENTIER ATEL
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Publication of FR732221ApublicationCriticalpatent/FR732221A/fr
H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
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FR732221D1931-01-311931-01-31Perfectionnements aux systèmes de téléindication et de télémécanique
ExpiredFR732221A
(fr)