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...
A union is the joining of two or more things.  Answer  A union is an organized labor association.   As in the union formed by the United States, as in an organized laborâ¦ union, a sexual union also implies more than joining. A union is as much a blending as a joining.