Mechanical device to trace and to draw a shape in a different scale, following its lines. It consists of four connected arms linked so as to form a deformable parallelogram. Used to grade fibreboard series in French, English, American size, etc..
Mechanical device to trace and to draw a shape in a different scale, following its lines. It consists of four connected arms linked so as to form a deformable parallelogram. Used to grade fibreboard series in French, English, American size, etc..