p/>As one of the largest employer associations in the nation, MRA helps its member organizations thrive by offering the most comprehensive assortment of HR services, information, education, and resources to help build successful workplaces and a powerful workforce.. Inspect, Diagnose, adjust, repair, overhaul truck, trailer, and mobile mechanical, hydraulic and pneumatic, such as cranes, bulldozers, graders, conveyors, forklifts.