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。
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。
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。
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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