Coal gas: Revision history

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13 February 2014

  • curprev 21:0521:05, 13 February 2014 en>Eric Kvaalen 23,988 bytes −908 Restored original hierarchy of the sections. Changed the introduction a bit towards the version of March 26, 2008. Took out some irrelevant pictures of distillation columns and put in a picture of a gas works.

27 May 2012