"It's just a trail, it's not worth mentioning."

Qin Lan waved his hand, and his heart was also extremely excited, with briquettes and iron ingots burned behind, the time was fast.

The most troublesome thing in blast furnace ironmaking is to control the temperature, and ordinary charcoal must be constantly controlled if it wants to reach the temperature, and it must be supplemented by bellows and other tools.

Now there are briquettes, as long as the briquettes burn......

"The First Prince of Great Wei" Chapter 329 Immortal Means is hitting in the hand, please wait a moment,

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