File:Popsci feb1941 fig3.jpg: Revision history

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3 August 2016

  • curprev 22:1322:13, 3 August 2016‎ Dnevil talk contribs‎ 509 bytes +509‎ To get up steam quickly, forced draft is produced by sucking air from the stack with the aid of a small electrically-driven compressor. The coal fire in fire box is boosted by directing a gas flame against the hot embers. https://books.google.com/book...
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