User contributions for 76.121.80.169
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5 February 2014
- 20:4820:48, 5 February 2014 diff hist −1 Gas engine →Thermal efficiency: mispelling (an to a)
13 December 2013
- 02:1302:13, 13 December 2013 diff hist +9,783 N Cylinder (engine) edited math bit for clarity