hard hat

US /ˈhɑːrd hæt/
UK /ˈhɑːrd hæt/
"hard hat" picture
1.

ヘルメット, 安全帽

a helmet made of hard material, worn by workers to protect their heads from falling objects or blows

:
All construction workers must wear a hard hat on site.
すべての建設作業員は現場でヘルメットを着用しなければならない。
He put on his hard hat before entering the mine.
彼は鉱山に入る前にヘルメットをかぶった。