The people trachea, the bronchial tube warp value is small, and has the very big individual difference.

国人气管、支气管经线值偏小，并有很大的个体差异。

youdao

The people trachea, the bronchial tube warp value is small, and has the very big individual difference.

国人气管、支气管经线值偏小，并有很大的个体差异。

youdao