Air filters for mechanical purposes; Back pressure valves as parts of machines; Cylinders for machines; DC generators; Exhaust pipes for land vehicles; Leveling mounts for machines; Machine parts, namely, joints and joint parts for connecting sliding strips, plates and guides; Mufflers for motors and engines; Oil filters for mechanical purposes; Parts for pneumatic blow guns, namely, inflator tips, inflator valves, valve adapters, nozzles, nipples, couplers, connectors and pivots; Pneumatic c...