hard hat
US /ˈhɑːrd hæt/
UK /ˈhɑːrd hæt/
1.
安全帽, 工程帽
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.
所有建筑工人必须在工地上戴安全帽。
•
He put on his hard hat before entering the mine.
他戴上安全帽才进入矿井。