2,200-Year-Old Chinese Troughs
In 1989, Chinese archaeologists unearthed 7 iron troughs on the 2,200-year-old timber bridge site, each measuring 6.5m long, 1m wide and 1m high, and weighing 3 tons.
On both ends of the troughs, iron rivets are clearly visible, which must be used to form a channel trough.
What the ancient Chinese were doing with the channel trough? To transport hot liquid iron to produce metal horses, as legend has it? https://www.viewofchina.com/2200-year-old-chinese-toughs/