12 Vehicles for locomotion by land, namely, cars, trucks, vans, vehicles for locomotion by air, namely, airplanes, helicopters, vehicles for locomotion by water, namely, boats, ships, yachts, and vehicles for locomotion by rail, namely, trains, rail vehicles, namely, passenger carriages; cars; automobile chassis; connecting rods for land vehicles, other than parts of motors and engines; transmission shafts for land vehicles; torsion bars for vehicles; vehicle chassis; hydraulic circuits for vehicles; undercarriages for vehicles; steering wheels for vehicles