Revision history of "File:Auto-Switcher.png"

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  • (cur | prev) 10:20, 28 April 2011Quatermass (talk | contribs). . (274 bytes) (+274). . (Circuit diagram of a set up to automatically switch in a alternative Mains source when the original one goes during a black-out. {{Rights reserved |title= |url= |from=Stuart Halliday |details=}})