PURPOSE: The purpose of this study was to evaluate the effect of high pull J hook headgear(HPHG) on root resorption of maxillary incisors during orthodontic treatment.
目的：评价标准方丝弓配合高位J钩对正畸治疗中牙根吸收的影响。
Objective To investigated the clinical value of J hook in higher traction by treatment of 40 gummy smile deep overbite patients.
目的通过对40例牙龈型微笑的深覆牙合患者的治疗，探讨J形钩高位牵引的临床应用。
Object To evaluate the effects of class II malocclusion treated with MBT technique with high pull headgear J hook.
目的：评价标准方丝弓配合高位J钩对正畸治疗中牙根吸收的影响。
The J-turn and fish-hook rollover test are simulated and the simulation result can expressed the rollover performance and can give some reference to the prototype testing.
对车辆侧翻多种工况进行了仿真研究，仿真结果可以准确的表达真实车辆的侧翻特性，为实车试验提供了参考。
Ray R K; Jonas J J; Hook R K Cold rolling and annealing textures in low carbon and extra low carbon steels.
李一鸣；任慧平；金自力低碳钢板冷轧退火组织和织构的研究。
Ray R K; Jonas J J; Hook R K Cold rolling and annealing textures in low carbon and extra low carbon steels.
李一鸣；任慧平；金自力低碳钢板冷轧退火组织和织构的研究。
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