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mobile equipment; namely, pickup trucks, graders, pavers, power curbers, loaders, compactors, backhoes, tractors, scrapers, trenchers, water trucks, asphalt tankers and cement haulers

aggregates, readymixed and precast concrete

real estate management

construction of residential, industrial and commercial developments, excavating and grading the land into streets and pads for buildings; installation of underground utility systems for water, sewer and storm drainage and the pouring of sidewalks, curbs, gutters and paving; construction of freeways, roads, bridges, airport runways, dams, canals, levees, driveways, parks and recreational facilities; and mining excavation