A hard hat is a type of protective headgear that is worn to prevent head injuries in hazardous work environments. It typically consists of a hard, impact-resistant shell made of materials like polycarbonate or ABS plastic, which is designed to distribute the force of an impact over a larger area to reduce the risk of head trauma. Many hard hats also have a suspension system inside that helps absorb shock and keep the shell away from the head to provide additional protection. Hard hats are commonly used in construction sites, mining operations, and other workplaces where there is a risk of falling objects, electrical hazards, or other potential head injuries.

“hard hat”的英语定义和含义

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