File:LittleEngines PreparingCastingMolds 1955.png
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LittleEngines_PreparingCastingMolds_1955.png (466 × 429 pixels, file size: 387 KB, MIME type: image/png)
Preparing a mold of parts for a live steamer, Bob Harpur's helper makes grooves in the sand, where molten metal will flow to form castings when the wooden patterns have been removed. "Popular Science", January 1956
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current | 21:51, 24 October 2013 | 466 × 429 (387 KB) | Dnevil (talk | contribs) | Preparing a mold of parts for a live steamer, Bob Harpur's helper makes grooves in the sand, where molten metal will flow to form castings when the wooden patterns have been removed. "Popular Science", January 1956 |
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