otturatore bedeutet auf Englisch

bolt [bolts]▼(sliding mechanism to chamber and unchamber a cartridge in a firearm)
noun
[UK: bəʊlt] [US: boʊlt]

lock [locks]▼(firing mechanism of a gun)
noun
[UK: lɒk] [US: ˈlɑːk]

shutter [shutters]▼(part of a camera)
noun
[UK: ˈʃʌ.tə(r)] [US: ˈʃʌ.tər]