File:Jim Kreider Berkshire Piston Valve Lap Lead diagram 201810.PNG: Revision history

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16 October 2018

  • curprev 18:3918:39, 16 October 2018‎ Dnevil talk contribs‎ 146 bytes +146‎ A diagram illustrating lap and lead in Jim Kreider's Berkshire locomotives. From "The Engine Booster", Los Angeles Live Steamers, September 2018.
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