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G04C15/0063—Synchronous clock systems, e.g. provided with radiolink or using transmission of alternating current via existing power distribution lines
G04C15/0072—Setting the time-indicating means, e.g. by controlling the frequency or by changing the drive of the separate clocks by using an auxiliary motor
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FR782006D1934-01-301934-11-29Perfectionnements apportés aux systèmes d'horloges électriques pour navires
ExpiredFR782006A
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