File:Mechanism.png
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 18:20, 27 September 2015 | | 1,199 × 898 (162 KB) | LingyuanMeng (Talk | contribs) | |
| 14:25, 5 October 2011 |  | 695 × 230 (52 KB) | Chenmiaomiao (Talk | contribs) |
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