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G04C11/00—Synchronisation of independently-driven clocks
G04C11/005—Synchronisation of independently-driven clocks by changing the ratio of the driving-gear
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Physics & Mathematics
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General Physics & Mathematics
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Electromechanical Clocks
(AREA)
BE604207A1960-05-251961-05-25Perfectionnements aux mouvements d'horlogerie et notamment aux dispositifs automatiques de remise à l'heure
BE604207A
(fr)