negative pressure breathing

• 负压呼吸

negative pressure breathing的用法和样例：

例句

1. Firemen should wear proper protective equipment and positive pressure self-contained breathing apparatus.
   消防员须身穿保护装置及正压呼吸设施。
2. The use of positive pressure respirators with double gloves also affects dexterity but to a lesser extent.
   虽然在配戴正压呼吸防护具并穿戴双层手套时会影响灵活度，但影响程度较低。