[ Attachment parts for machines and machine apparatus and for motors, engines and gears, except motors, engines and gears for vehicles, of plastics, namely, valves, valve covers, exhaust manifolds, oil pans, oil separator covers, filler caps being machine parts and heat shields; ] parts of plastic for machine and machine apparatus construction, and for motor and gear construction, other than the construction of motors and gears for vehicles, [ namely, push rod protective tubes, dampening elem...

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