The underground electrical fitter should not only know the installation and maintenance related to the electrical line facilities, but also know the fitter's work, which is dirty. Electricians only need to know the installation and maintenance of electrical wiring facilities. It's cleaner

There is a special book named "Underground Electrical Fitter", which is a unified teaching material for safety technical training and assessment of special operators in coal mines. It can be used as a technical training for coal mine safety inspectors, and can also be used as a reference for grass-roots management cadres, related engineers and technicians and teachers and students in coal universities.