File:LittleEngines PreparingCastingMolds 1955.png: Revision history

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24 October 2013

  • curprev 21:5121:51, 24 October 2013‎ Dnevil talk contribs‎ 214 bytes +214‎ 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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