Miners wore a helmet as a guard against falling rocks.

矿工头戴钢盔, 防护落下的岩石。

The final exercise pitted a counterterrorism squad against an escaping vehicle of balaclava-clad men who holed up in a concrete building.

项是针对藏在混凝土工事中的辆满载头戴钢盔的武装员的装甲车开展防暴行动。