the basic information in chronic obstructive pulmonary disease (Chronic obstructive, pulmonary diseaseCOPD) refers to a group of diseases in the lower respiratory tract obstructive symptoms permanently from the changes of the trachea or lean meat until symptoms or chicken trachea stenosis d
.The narrow or tons of trachea is a chronic back to normal, which cannot be disease in this group, including chronic bronchitis. And the air bag to inflate the lungs, which has similar manifestations of the disease
.
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