Source google image: https://image.slidesharecdn.com/manueldeltudedeprix-150408101951-conversion-gate01/95/manuel-de-ltude-de-prix-11-638.jpg?cb=1428488401
Coefficient devis peinture
Source google image: https://image.slidesharecdn.com/manueldeltudedeprix-150408101951-conversion-gate01/95/manuel-de-ltude-de-prix-11-638.jpg?cb=1428488401