Answer:
steel
Step-by-step explanation:
The industrial revolution created the necessary conditions for the mechanization of production, primarily spinning, weaving, metal, and woodworking. It was a transition from the use of individual machines to an “automatic system of machines” in which conscious functions of control remain behind the person: the person becomes next to the production process as its controller and regulator. The most important inventions of this period were the inventions by the Russian mechanic I. I. Polzunov of the automatic power regulator for the steam boiler (1765) and the English inventor J. Watt who invented the centrifugal speed controller of the steam engine (1784), which later became the main source of mechanical energy for driving machines and mechanisms.