Positive pressure respirator 正压式呼吸器

Clevedon positive-pressure respirator 克累韦东氏正压呼吸器

intermittent positive pressure respirator 间歇性正压呼吸器

positive pressure face mask respirator 正压面罩呼吸器

positive-negative pressure respirator 正负压呼吸器

Positive pressure type respirator 正压式呼吸器

continuous positive airway pressure respirator 连续正压呼吸器

intermittent positive pressure breathing respirator 间歇正压呼吸器

oxygen respirator with positive pressure 正压氧气呼吸器