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Internals of Quartz Clock Mechanisms
piston
(jim)
https://www.youtube.com/watch?v=LGnbOOF1oeo
(#11218960@0)
Last Updated: 2017-12-3
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家有一日本精工挂钟，走了30年过头了，除去夏冬调整时间才核对一下外平时误差极小。请问：机械手表还要洗油泥，可这家伙也没人伺候，缘何勤勤恳恳，何材料所为？
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