accecatoio significa in inglese

counterbore [counterbores]▼(recess-machining tool)
noun
[UK: kˈaʊntəbˌɔː] [US: kˈaʊntɚbˌoːr]

countersink [countersinks]▼(a conical recess machined around a hole)
noun
[UK: ˈkaʊn.tə.sɪŋk] [US: ˈkaʊn.tə.sɪŋk]