pulmonary retractor

例句：

1. 1.The pulmonary retractor was used to help the patient breathe more easily.
   肺回缩器被用来帮助病人更容易地呼吸。
2. 2.The doctor inserted a pulmonary retractor into the patient's chest cavity.
   医生将一个肺回缩器插入病人的胸腔。
3. 3. During surgery, the pulmonary retractor is used to keep the lungs from moving around too much.
   在手术期间，肺回缩器被用来保持肺部不会移动太多。