An air brake or, more formally, a compressed air brake system, is a type of friction brake for vehicles in which compressed air pressing on a piston is used to apply the pressure to the brake pad needed to stop the vehicle.
Define industrial union. industrial union synonyms, industrial union pronunciation, industrial union translation, English dictionary definition of industrial union. n. A labor union to which all the workers of a particular industry can belong regardless of their occupation or trade. n a labour organization in which all...
Legal Definition of labor union. : a labor organization usually consisting of workers of the same trade that is formed for the purpose of advancing its members' interests (as through collective bargaining) in respect to wages, benefits, and working conditions â see also craft union, bargaining unit.