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hp63092652
关于停三秒,本人始终有疑问,这种用压簧支撑秒轮的结构拆过不少,远的不说,西铁城8200,苏联的2416A,欧米茄的5XX,强震动可能导致秒轮齿啮合短暂分离,秒不走,由于拖轮结构时分照走,不影响走时不假。但怎么能保
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