The unit focused on the taxonomy of and principles behind the six so-called simple machines: Inclined plane, wedge, and screw lever, wheel and axle, and pulley These machines are properly grouped so as to express the unity of principle behind each of the two groupings: A wedge is a moving inclined plane, and a screw is a twisted inclined plane.
(A wedge; is; a moving inclined plane) Context(A wedge is,List([270, 280))):(The unit; focused; on the taxonomy of and principles behind the six so-called simple machines) (a screw; is; a twisted inclined plane)
A wedge is,List([270, 280))
A wedge The unit a screw
is focused is
a moving inclined plane
on the taxonomy of and principles behind the six so-called simple machines
a twisted inclined plane