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1·Now he had to improve on the lever escapement, which had been invented in 1754 by the English horologist Thomas Mudge and used in most watches since.

接着他要完善的是叉瓦式擒纵机构。叉瓦式擒纵机构1754年由英国制表师Thomas Mudge发明，从那以后就广泛运用于大部分表中。