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20:44, 18 September 2011 121.91.13.186@enwiki (talk | contribs | logs) edited Talk:Operational amplifier ( History )
05:58, 18 September 2011 121.91.13.186@enwiki (talk | contribs | logs) edited Operational amplifier ( External links Added easy to understand Flash Animations that I have created.)
08:42, 16 September 2011 121.91.13.186@enwiki (talk | contribs | logs) edited Operational amplifier applications ( External links )
08:28, 16 September 2011 121.91.13.186@enwiki (talk | contribs | logs) edited Operational amplifier ( See also )

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