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Schema electrique 2 lampes 1 interrupteur
Source google image: http://1.bp.blogspot.com/-Fs2rii4DyWs/VLbQ2ZUgfCI/AAAAAAAAAO0/oAfHP7wWJyI/s1600/schema%2Belectrique%2Binterrupteur%2Bdouble%2Ballumage%2B.jpg