首页>
外国专利>
device for drawing of the geometric location of the points on a is a fixed umfangspunkt a circle rotating beam are located and the distance of the second intersection of the jet with the circle is equal to the radius
device for drawing of the geometric location of the points on a is a fixed umfangspunkt a circle rotating beam are located and the distance of the second intersection of the jet with the circle is equal to the radius
