防御器官动物或植物的防护层，结构或器官，如牙齿，爪子，荆棘或乌龟的壳 A protective covering, structure, or organ of an animal or a plant, such as teeth, claws, thorns, or the shell of a turtle.
罩，防护罩用于脸或头的保护性覆盖物 A protective covering for the face or head.
盔甲防护性外套，如锁子甲，穿上后保护身体免受武器攻击 A defensive covering, such as chain mail, worn to protect the body against weapons.
将防护罩确实放好後再开机器。 Ensure the guard is in place before operating the machine.
