Electronic appliances: can be used to manufacture electric wrench shells, switch handles, and also to make parts for telephones, radios, tape recorders, video recorders, televisions, computers, and fax machines Components, timer parts, cassette tape holder, etc. Mechanical equipment: used for manufacturing various gears, rollers, bearings, conveyor belts, springs, cams, bolts, etc The structural components of mechanical equipment such as pump body, casing, impeller friction bearing seat, etc.