操作液压锤时，须佩戴护耳、护目和呼吸保护设备。

When operating the breaker you must use ear protection, eye protection, and breathing protection.

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研究人员指出，虽然他们带有呼吸面具和其他保护设备，但是通常会在离火事不远处将设备摘除。

Though they wear breathing apparatus and other protective equipment while fighting fires, researchers point out, they typically remove the gear when they're merely in the vicinity of the fire.

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研究人员指出，虽然他们带有呼吸面具和其他保护设备，但是通常会在离火事不远处将设备摘除。

Though they wear breathing apparatus and other protective equipment while fighting fires, researchers point out, they typically remove the gear when they're merely in the vicinity of the fire.

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