What tools and instruments are commonly used in substation maintenance?

① Commonly used electrical tools (wire pliers, screwdriver, electrical knife, movable handle, pointed nose pliers)
② Public tools (wrench sets, pipe wrenches, flat pliers, electric drills, electric soldering irons, grinding wheels, fitter tools, and lifting tools)
③ Common measuring tools (steel ruler, level ruler, micrometer, vernier caliper)
④ Instruments (multimeter, megohmmeter, bridge) ⑤ Special tools for maintenance of substation equipment