In this paper,by means of application of hydro simulating method of two phase fluid,effect of runer structure on drag collection was discussed.

应用两相流水模拟试验方法，研究了浇注系统中横浇道结构形式对其集渣影响。

Conclusion Anatomic variations of ostiomeatal com plex are common findings.Using coronal position together with naphazoline hydro chloride dropping is of first choice in CT examination.

结论解剖变异是较常见象，首先采用冠状位扫描，并用方法较好。