every enormous machine were people responsible for keeping production moving—checking equipment, handling materials, performing repairs, and working through long shifts in demanding conditions.
The steel balls themselves never received attention, of course. They simply continued their repetitive work.
Why Grinding Was So Important
Grinding may sound like a relatively minor industrial process, but it has played an important role in manufacturing and resource processing.
Many materials cannot be used effectively in their original form. Ore may need to be reduced so valuable minerals can be separated. Other raw materials need
