Source google image: http://wikigeotech.developpement-durable.gouv.fr/images/thumb/2/27/Q_sur_S_lecture_distance.jpg/300px-Q_sur_S_lecture_distance.jpg
Terrassement q/s
Source google image: http://wikigeotech.developpement-durable.gouv.fr/images/thumb/2/27/Q_sur_S_lecture_distance.jpg/300px-Q_sur_S_lecture_distance.jpg