crash helmet

crash-helmet的词性：
n.（名词）

1. A padded helmet, as one worn by bicyclists, motorcyclists, or aviators, to protect the head in case of accident.
防撞头盔：自行车手、摩托车运动员或飞行员等穿戴的在发生事故时保护头部的装有衬垫的头盔