*Vertices 2 1 "typewriters; selective printing mechanisms, i.e. mechanisms printing..." 0.0 0.0 0.0 x_fact 1.098612 y_fact 1.098612 2 "photomechanical production of textured or patterned surfaces, e.g. for..." 0.0 0.0 0.0 x_fact 0.000000 y_fact 0.000000 *Matrix 1.000000 0.577350 0.577350 1.000000