Wash or clean vehicles, machinery, and other equipment. They use materials such as water, cleaning agents, brushes, cloths, and hoses.

Inspect and monitor transportation equipment, vehicles, or systems to ensure compliance with regulations and safety standards.

Inspect aircraft, maintenance procedures, air navigational aids, air traffic controls, and communications equipment to ensure conformance with federal safety regulations.

Shape molten glass according to patterns.

Operate or watch over bonding machines that use adhesives to join items for further processing or to form a completed product. Their tasks include joining veneer sheets into plywood; gluing paper; or joining rubber and rubberized fabric parts, plastic, simulated leather, or other materials.

Manufacture electronic semiconductors. They load materials into furnace. They cut ingots and load them into crystal growing chamber and monitor controls. They locate crystal axis in ingot using x ray equipment and cut ingots into wafers. They clean, polish, and load the wafers into furnaces, chemical baths and equipments to form circuitry and change conductive properties.

Operate or watch over painting machines to paint surfaces of transportation equipment, such as automobiles, buses, trucks, trains, boats, and airplanes. Includes painters in auto body repair facilities.

Set up, operate, or watch over machines to coat or paint any of a wide variety of products, including glassware, cloth, ceramics, metal, plastic, paper, or wood, with lacquer, silver, copper, rubber, varnish, enamel, oil, or rust proof materials.

Cut, grind, and polish eyeglasses, contact lenses, or other precision optical elements. They assemble and mount lenses into frames or process other optical elements. Includes precision lens polishers or grinders, centerer edgers, and lens mounters.

Construct, fit, maintain, or repair medical supportive devices, such as suspenders, orthotics and prosthetic devices, joints, arch supports, and other surgical and medical appliances.