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- 21:51, 24 October 2013 Dnevil talk contribs uploaded File:LittleEngines PreparingCastingMolds 1955.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 )