[Unproductive expenditure of energy by coal miners during passage along the shaft to the coal face].
D003032:Coal Mining; D004526:Efficiency; D004734:Energy Metabolism; D006801:Humans; D012426:Russia
O neproizvoditel'nykh zatratakh énergii gornorabochikh ugol'nykh shakht pri prodvizhenii po shakhte k zaboiam.