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PRELIMINARY FREQUENCY REGULATING METHOD FOR REGULATORS OF WATCH MECHANISMS
PRELIMINARY FREQUENCY REGULATING METHOD FOR REGULATORS OF WATCH MECHANISMS
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机译:手表机制调节器的初步频率调节方法
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摘要
A flange is provided on the rim of a balance so that the preliminary frequency regulation may be attained by cutting said flange, with a balance spring mounted on the balance. At least three markings are provided on the peripheral surface of the rim so that a true frequency may be detected without being influenced by an amplitude change.
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