安全帽 /ānquánmào/ angolul

crash helmet▼(helmet for motorcyclists)
noun
[UK: kræʃ ˈhel.mɪt] [US: ˈkræʃ ˈhel.mət]

hard hat▼(construction helmet)
noun
[UK: hɑːd hæt] [US: ˈhɑːrd ˈhæt]

safety helmet▼(type of helmet)
noun
[UK: ˈseɪf.ti ˈhel.mɪt] [US: ˈseɪf.ti ˈhel.mət]