Which outcome accelerated crossbow development during China's Warring States period?

💡 Explanation

Increased cast iron promoted crossbow use because the Bessemer Process allowed more robust trigger mechanisms at large scale; therefore more soldiers could use higher draw-strength bows effectively, rather than relying only on more expensive and weaker bronze triggers.

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• Which consequence accelerated after the Qin Dynasty's development of composite trigger mechanisms in volume-produced crossbows?