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← HistoryWhich risk increases in early cast iron crossbow triggers under sustained tension?
A)Reduced bolt firing velocity
B)Accelerated trigger crystallization
C)Pronounced metal fatigue cracking✓
D)Increased oxidation temperature
💡 Explanation
Creep becomes significant in early cast iron because of imprecise alloy control; this causes gradual deformation under sustained tensile stress within the trigger sear. Therefore, metal fatigue cracking risk increases, rather than a reduced velocity that is from the bow's draw weight.
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