Answer:
Interchangeable parts were first used in the guns (muskets) industry.
Explanation:
- The initial assembling of guns was itself in the first place done using distinct parts that simply worked in synchronous during the functioning of the gun.
- Having interchangeable parts allowed the owners of the gums and militias to replace them for repair without having to replace the entire weapon.
- This advancement led to guns becoming available at the cheapest prices and thus, everyone kept guns for their safety.