1, the repair and maintenance of mechanical equipment, such as machine tools, clamping equipment, stamping equipment, and so on.
2, the repair and maintenance of electronic equipment, such as computers, cell phones, communication equipment, etc..
3, chemical equipment repair and maintenance, such as reactors, pharmaceutical equipment, etc..
4, repair and maintenance of apparatus and equipment, such as medical equipment, testing instruments.
5, repair and maintenance of large equipment, such as automobiles, ships, airplanes, etc..