Acetylene cleaning apparatus, namely, centrifugal separators for the cleaning of acetylene; Engines for air cushion vehicles; belts for motors and engines; bulldozers; capstans; carburetor feeders; carburetors; catalytic converters for motors and engines; centrifugal pumps; compressed air pumps; conveyors except aerial conveyors; cranes, lifting and hoisting apparatus; crank cases for machines, motors and engines; crushing machines; cylinder heads for engines; cylinders for motors and engines; derricks; disintegrators for chemical processing; elevators; escalators; excavators; exhausts for motors and engines; filter presses for chemical processing; foundry machines, namely, casting machines; fuel conversion apparatus for internal combustion engines; garbage disposals; gasifiers; glow plugs for diesel engines; grinding machines; hoists; igniting devices for internal combustion engines; igniting magnetos for engines; fuel injectors for engines; lifts namely, car lifts, and power-operated boat lifts; machine fly-wheels; machine wheels; machinewheelwork, namely, wheels being parts of machines; mangles; exhaust manifolds for engines; mixing machines; moving pavement sidewalks; mufflers for motors and engines; oil refining machines; piston segments; pistons for cylinders; pistons for engines; plunger pistons; presses machines for industrial purposes; Dower-operated rack and pinion iacks; radiators cooling for motors and engines; rolling mills; separators, namely, steam separators, oil separators, dust separators and centrifugal separators; sewage pulverizers; gas-operated soldering blow pipes; sorting machines for industry; sparking plugs for internal combustion engines; su perchargers for automobiles; superheater, namely, steam engines that heat the steam generated by the boiler again; trash compacting machines; truck lifts; vulcanization apparatus; waste disposers machines; water separators; electric welding machines; winches; graders; oavloaders, namely, excavating machines; alternators for land vehicles; current generators; electric motors other than for land vehicles; diesel engines for ships or aircrafts; diesel engines other than for vehicles; steam turbines for ships or aircraft; steam turbines other than for vehicles