What is a general worker doing in a Serbian mine?

General worker, welder, plumber According to the inquiry of Serbian Zijin Mining Recruitment Network, it is known that: fitter, welder 400-600, plumber, mechanical and electrical equipment installer, general worker, industrial electrician 400-600, belt worker 600, electromechanical administrator, with team leader 600. Serbia's coal reserves are mainly located in the Korubara River, Kostolaz and Kosovo. Excluding Kosovo, the coal reserves are about 654.38+0.6 billion tons.