Автор работы: Пользователь скрыл имя, 16 Октября 2011 в 12:45, реферат
Crushing is process of consecutive reduction of the sizes of pieces of a firm material from initial the fineness of to demanded. By manufacture of rubble as a result of crushing the ready product turns out. In other cases this process is preparatory for the further processing, for example, by cement manufacture.