7 [ Agricultural machines and instruments, namely, tractors, cultivators, plows, disk harrows, rototillers, spading machines, subsoilers, seeders, planters, seed drills, fertilizer spreaders, harvesters, balers, mower, loaders, which are not hand-operated, ] motor-operated instruments, namely, snow plows, snow blowers, snow throwers, for removing snow from roads, railways and runways, machines for clearing roads, namely, [ road sweeping machines, edge trimmers, rotary weeders, mowers, graders, ] snowplows, snow and ice cutters as machine parts; machines, namely, snow blowers, fully tracked vehicle designed to move on snow for grooming ski trails and snow mobile trails [, groomers, for preparing ski runs, machines, namely, rollers, cutters, milling machines, pavement breakers, payers, for preparing roads, electrically operated brushes, being parts of machines, road maintenance machines, namely, road sweeping machines, edge trimmers, rotary weeders, mowers, graders, flattening machines for compacting surfaces, namely, soil and road pavement ] ; self-propelled snow and ice machine cutters; special vehicles, namely, snow plows, snow blowers, snow throwers, [ road sweeping machines, edge trimmers, rotary weeders, mowers, graders, ] for snow [ and road ] clearance