IPA: /ˌɪntəˈʧeɪndʒəbl/
KK: /ˌɪntərˈʧeɪndʒəbl/
Able to be exchanged or replaced with something else without losing value or function.
The two parts are interchangeable, so you can use either one in the machine.
Interchangeable → It is formed from "inter-" (meaning between) and "cambiare" (meaning to exchange). The word describes items that can be exchanged or swapped with each other without loss of function or meaning.
Think of items that can be 'exchanged' ('cambiare') 'between' ('inter-') each other — that's why interchangeable means they can be swapped.