C322 Pure Iron

These furnaces were at least seven or eight meters tall, cylindrical in shape, with a large shelf below to keep them balanced, and at the edges of these furnaces were slender railings that led like stairs to the top of the furnace.

At this moment, Lee Dabao climbed along these railings all the way to the top of the furnaces. The top of the furnaces was a ventilation vent. When smelting steel