Abstract: The disclosure provides a vehicle performance test device, capable of facilitating the wear resistance of a rear roller and thereby reducing testing cost. A vehicle performance test device according to an embodiment includes: a test bed, configured to support a vehicle; and a front roller and a rear roller, disposed in pair on the test bed and spaced apart in a vehicle front-rear direction to support a wheel of the vehicle. The wheel of the vehicle is placed between the front roller and the rear roller to test braking performance of the vehicle. An electrodeposition particle layer is formed on a surface of the rear roller by electrodepositing rigid particles on a metal plating layer.

Abstract: Provided is a vehicle inspection system that enables inspection of an inspection vehicle provided with electromagnetic sensors having different wavelengths. A first absorption member and a second absorption member are provided to non-overlapping positions in front of a position at which the radiation range of radiated waves from the first electromagnetic sensor and the radiation range of radiated waves from the second electromagnetic sensor overlap.

Abstract: Provided is a vehicle inspection system that enables inspection of an inspection vehicle provided with electromagnetic sensors having different wavelengths. A first absorption member and a second absorption member are provided to non-overlapping positions in front of a position at which the radiation range of radiated waves from the first electromagnetic sensor and the radiation range of radiated waves from the second electromagnetic sensor overlap.

Abstract: Vinyl chloride monomer, or a monomeric mixture comprising vinyl chloride as a main component and other monomers co-polymerizable therewith in an aqueous reaction medium, is polymerized in a polymerization vessel. All of the surfaces of the inside walls of the vessel and the agitator blades, the baffle plates and the like with which the vessel is equipped, are coated prior to the polymerization with at least one of a specific class of nitrogen-containing aromatic heterocyclic compounds. Not only is the deposition of polymer scale surprisingly reduced, but also the polymer thus obtained has good physical and chemical properties.