The function of the trachea is to be the main passageway for air to pass from the upper respiratory tract to the lungs. As air flows into the trachea during inhalation, it is warmed and moisturized before entering the lungs. Most particles that enter the airway are trapped in the thin laye...
aA fitting 224 provides access into the passageway 220 along the side of column 14, and an additional flexible coiled solvent delivery line 226 (see also FIG. 3) extends from tap 224 to a fitting 228 on a cleaning shroud 230 配件224提供通入入通道220沿专栏14的边和一个另外的灵活的卷起的...
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behaviors, which in turn resulted in several permanent and semi-permanent changes on the streets, such as the occupation of the sidewalks leading people to using the road as a passageway instead of the sidewalk on many occasions, while the sidewalk became a zone to sit down, eat, and mingle...