4视频豆瓣6.6
5视频
33视频豆瓣7.5
3视频
6视频豆瓣6.2
7视频豆瓣7.2
通过玻璃观察,当齿轮旋转时雕刻的手表机械装置。
Mechanism of a watch engraved as its gears rotate, seen through glass.
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