trachea is in the midline ; trachea central
·气管（向右）偏移[displacement of trachea (tracheal deviation to the right)] ·气管居中[trachea is in the midline] ·气管内异物[intratracheal foreign body] ..
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结果：在气管杈层面上，尖后段静脉居中，其前方，前段动脉居前段支气管的内前方；
Results:On the section through tracheal bifurcation, in front of the apicoposterior segmental vein, anterior segmental artery lay medioanterior to anterior segmental bronchus.
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