Abstract: The exhaust gas-purifying catalyst includes at least one of a first composite oxide represented by a formula A(Al2-xBx)O4 and a second composite oxide represented by a formula (Al2-yCy)O3, wherein element A is a divalent transition metal other than platinum-group elements, each of elements B and C is a transition metal other than platinum-group elements, x satisfies 0<x<2, and y satisfies 0<y<2.

Abstract: A steering mechanism for vehicle rear wheels comprises an input shaft rotated in response to rotation of a vehicle steering wheel. A cam member is connected to the input shaft for rotation therewith. The cam member is interposed between a pair of cam followers spaced widthwise of the vehicle and held by a follower support which is linearly movable widthwise of the vehicle when the input shaft is rotated. Such movement of the follower support is transmitted to a knuckle arm of each rear wheel by means of a tie member, whereby the orientation of the rear wheel is controlled in dependence upon front wheel steering by suitably selecting a cam profile for the cam member.