Assemble or modify electromechanical equipment or devices, such as servomechanisms, gyros, dynamometers, magnetic drums, tape drives, brakes, control linkage, actuators, and appliances.

Assemble, fit, fasten, and install parts of airplanes, space vehicles, or missiles, such as tails, wings, fuselage, bulkheads, stabilizers, landing gear, rigging and control equipment, or heating and ventilating systems.

Move or install mobile homes or prefabricated buildings.

Repair, clean, and adjust mechanisms of timing instruments, such as watches and clocks. Includes watchmakers, watch technicians, and mechanical timepiece repairers.

Repair percussion, stringed, reed, or wind instruments. They specialize in one area, such as piano tuning.

Repair, adjust, or install all types of electric or gas household appliances, such as refrigerators, washers, dryers, and ovens.

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.