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Combined display of all available logs of Efficiency Finder. You can narrow down the view by selecting a log type, the username (case-sensitive), or the affected page (also case-sensitive).
- 13:43, 19 February 2015 Chip (Talk | contribs) uploaded a new version of File:Rotatory Wheel heat exchanger.jpg
- 18:14, 24 November 2014 Chip (Talk | contribs) uploaded File:Rotatory Wheel heat exchanger.jpg