File:LittleEngines PreparingCastingMolds 1955.png

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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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current21:51, 24 October 2013Thumbnail for version as of 21:51, 24 October 2013466 × 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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