File:Piston ring illustrated.png
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"The Steam engine and gas and oil engines" by John Perry. 1899. Copyright expired.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 00:28, 29 May 2011 | | 553 × 592 (246 KB) | John Chamberlain | "The Steam engine and gas and oil engines" by John Perry. 1899. Copyright expired. |
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