Fireman. The scope of special operations mainly includes: ① electrical operations, including high-voltage electrical operations, low-voltage electrical operations and explosion-proof electrical operations; ② Welding and hot cutting operations, including melting welding and hot cutting operations, pressure welding operations and brazing operations; (3) aerial work, including aerial erection and aerial installation, maintenance and demolition; (4) refrigeration and air conditioning operations, including refrigeration and air conditioning equipment operations, refrigeration and air conditioning equipment installation and maintenance operations; (5) Safe operation of coal mine; ⑥ Safe operation in metallic and nonmetallic mines; ⑦ Safe operation of oil and gas; (8) Safe operation in metallurgical (nonferrous) production; Pet-name ruby safe operation of dangerous chemicals; Attending the safe operation of fireworks; Pet-name ruby other operations identified by the General Administration of Safety Supervision. Options c, d and e are not special operators.