线头
4.A cephalometric roentgenographic study of adolescents with normal occlusion in Changchun
7.McNamara cephalometric analysis of the 240 Changchun children with normal occlusion
8.Study on dentofacial hard tissues in Han nationality of Shijiazhuang with normal occlusion
10.The end of the wire had become accidentally fused with the switch, and was dangerous.


