Source google image: http://www.mytopschool.net/mysti2d/activites/polynesie2/ETT/C041/22/Schema1/lib/symb%20uni.gif
Symbole graphique schema electrique
Source google image: http://www.mytopschool.net/mysti2d/activites/polynesie2/ETT/C041/22/Schema1/lib/symb%20uni.gif