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Which effect increased the scaling production of Song Dynasty crossbow trigger mechanisms when using cast iron?

A)Reduced component dimensional variation
B)Increased trigger tensile strength
C)Enhanced corrosion resistance offshore
D)Simplified heat treatment schedules

💡 Explanation

The improved Reduced component dimensional variation due to standardized molds increased the interchangeability of parts using investment casting; an advantage that allowed complex crossbow triggers to be mass-produced efficiently, therefore leading to higher overall production yield, rather than relying on skilled manual fitting.

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