Furnaces Explained in Different Contexts | Generated by AI
“Furnaces” means large heated devices used for burning, smelting, or heating materials at very high temperatures.
You’ll see it in different contexts:
1. Metal / industrial use A furnace melts metal, refines steel, or heats materials in factories.
2. Heating a building In some countries, a “furnace” is the central heating system that burns gas or oil to warm air for the house.
3. Historical / “backyard furnaces” context In the Mao-era story you mentioned, “backyard furnaces” were small, improvised steel-making ovens built by villagers to produce iron and steel.
If you want, I can explain the “backyard furnace movement” in plainer terms too.