The Second Affiliated Hospital of Ningxia Medical University(the First People’s Hospital of Yinchuan Ningxia)Yinchuan 750001 Ningxia China;
The Second Affiliated Hospital of Ningxia Medical University(the First People’s Hospital of Yinchuan Ningxia)Yinchuan 750001 Ningxia China;
The Second Affiliated Hospital of Ningxia Medical University(the First People’s Hospital of Yinchuan Ningxia)Yinchuan 750001 Ningxia China;
The Second Affiliated Hospital of Ningxia Medical University(the First People’s Hospital of Yinchuan Ningxia)Yinchuan 750001 Ningxia China;
The Second Affiliated Hospital of Ningxia Medical University(the First People’s Hospital of Yinchuan Ningxia)Yinchuan 750001 Ningxia China;
The Second Affiliated Hospital of Ningxia Medical University(the First People’s Hospital of Yinchuan Ningxia)Yinchuan 750001 Ningxia China;
Large-volume lung lavage; Bronchus; Pneumoconiosis; Chronic obstructive pulmonary disease;