Agricultural machines and implements, other than hand operated, namely, slurry spreaders, slurry spreading booms, slurry injectors, muck spreaders, slurry mixers, agricultural choppers in the nature of mowers, pasture toppers in the nature of mowers, meadow aerators, silo unloaders-feeders in the nature of mechanized livestock feeders, hydrocleaners in the nature of power operated sprayers, running gears in the nature of transmission gears for machines, slurry macerators in the nature of mace...