дебит дробилка. Continued fraction Wikipedia. In mathematics, a continued fraction is an expression obtained through an iterative process of representing a number as the sum of its integer part and the reciprocal of another number, then writing this other number as the sum of its integer part and another reciprocal, and so on.
Summarized the research results of domestic and foreign scientists in the field of industrial hygiene in underground structures: tunnels, mines, pits.It is shown that the leading harmful factors of production environment and labor process are dust, noise, vibrations, unfavourable microclimate, the lack of natural light, ionizing radiation (radon), physical loads, nervous-emotional stress.