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...
trade union - an organization of employees formed to bargain with the employer; you have to join the union in order to get a job. labor union, trades union, union, brotherhood. organization, organisation - a group of people who work together. industrial union, vertical union - a labor union that admits all workers in a given industry irrespective of their craft. craft union - a labor union whose membership is restricted to workers in a particular craft.