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

Test, adjust, or repair biomedical or electromedical equipment.

Repair and adjust cameras and photographic equipment, including commercial video and motion picture camera equipment.

Lubricate machinery, change parts, or perform other routine machinery maintenance.

Repair, install, adjust, or maintain industrial production and processing machinery or refinery and pipeline distribution systems.

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

Install and repair industrial and commercial refrigerating systems.

Install, service, or repair heating and air conditioning systems in residences or commercial establishments.

Install, repair, and maintain mechanical regulating and controlling devices, such as electric meters, gas regulators, thermostats, safety and flow valves, and other mechanical governors.

Repair and replace tires.