Machine parts, namely, joints and joint parts for connecting sliding strips, plates and guides; mechanical seals being machine parts; pistons for engines; machines, namely, crushers, impact mills, breakers, pulverizers, mixers and blenders and parts therefor, for industrial and commercial applications; machine tools, namely, powered machines for cutting or shaping or finishing metals or other materials; machines utilizing rotational motion for high energy surface finishing and material treatment; material handling machines, namely, palletizers, case elevators, automatic pallet dispensing machines and automatic slip sheet dispensing machines; mechanical condensators; piston rings