Abstract: A vehicle management method includes assembling a vehicle body of a vehicle and a power source to be mounted on the vehicle, acquiring, at a first time, first gear-ratio-related information which is information related to a gear ratio of a transmission section, the transmission section being a whole or part of a power transmission mechanism between the power source and a wheel of the vehicle, storing the first gear-ratio-related information in a storage unit mounted on the vehicle or a storage unit of an external device provided to be capable of communication with the vehicle, acquiring, at a second time after the first time, second gear-ratio-related information which is information related to the gear ratio of the transmission section, and comparing the first gear-ratio-related information stored in the storage unit with the second gear-ratio-related information.

Abstract: A ball stud having a ball at one end of a rod-shaped stud. The ball stud comprises: a metal plating film formed on the surface of the stud; and a trivalent chromate film continuously formed over both the surface of the metal plating film formed on the stud and the surface of the ball, whereby rust is inhibited in the boundary of the metal plating film. An externally threaded portion is also coated, if formed in the ball stud, on its surface with the metal plating film and the trivalent chromate film.

Abstract: A ball stud having a ball at one end of a rod-shaped stud. The ball stud comprises: a metal plating film formed on the surface of the stud; and a trivalent chromate film continuously formed over both the surface of the metal plating film formed on the stud and the surface of the ball, whereby rust is inhibited in the boundary of the metal plating film. An externally threaded portion is also coated, if formed in the ball stud, on its surface with the metal plating film and the trivalent chromate film.

Abstract: A paper stacking apparatus for a sheet-fed press includes a horizontal lower plate, a driving unit, a vertical chain, an upper plate, a front gauge, biasing members, a cam, and engaging members. The lower plate is free to move in a vertical direction. The driving unit and the vertical chain vertically move the lower plate. The upper plate is mounted on the lower plate to be movable in at least a paper feed direction and stacks paper sheets. The front gauge is vertically fixed on a machine frame and aligns the leading end of the paper sheets stacked on the upper plate in the paper feed direction. The biasing members bias two side portions of the upper plate in a direction to be pressed to the front gauge. The cam and the engaging members position the upper plate biased by the biasing members in the paper feed direction such that the distal end thereof is close to the front gauge in accordance with an upward movement of the lower plate.