File:Coventry Valve Figure3.jpg: Revision history

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25 January 2015

  • curprev 20:4020:40, 25 January 2015‎ Dnevil talk contribs‎ 125 bytes +125‎ Figure 3 from "Design and Layout of a Valve Gear" by H.J. Coventry. From "The North American Live Steamer", Vol 1 No 2, 1956.
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