延长呼气法和平静呼气法呼气末二氧化碳监测在慢性阻塞性肺疾病中的比较
연장호기법화평정호기법호기말이양화탄감측재만성조새성폐질병중적비교
Comparing Study of Prolonged Expriation Method and Expiration Method in the Measurement of Expired Gas PCO2 at end Expiration in COPD Patients
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