unit tractor

Analysis of cephalogram associated with patients used cervical pull headgear distalization for maxillary molar;

口外弓颈牵引推磨牙远移的X线头影测量分析

The research and application of SQ-1200 type crossheading continuous tractor in Chaohua Coal Mine;

SQ—1200型顺槽连续牵引车在超化煤矿的研究与应用

Kinematic simulation of clamping/holding mechanism for no-rod airplane tractor based on Pro/Engineer;

基于Pro/Engineer的飞机牵引车夹持机构的运动仿真

Application of Torque Converter in Domestic Heavy-Duty Tractor;

液力变矩器在国产重型牵引车上的应用

Clinical Study of Rapid Are Extension with Anterior Facemask Traction in the Treatment of Angle Ⅲ Malocclusion;

快速扩弓联合面弓前牵引矫治安氏Ⅲ类错的临床研究

Comparison with the Effect of the Skeletal-dental and Soft Tissue Profile Changes of Maxillary Protraction with Labiolingual Appliances or Rapid Maxillary Expansion Appliances

唇舌弓式及快速扩弓式上颌前方牵引口内装置对牙颌面及软组织侧貌影响的比较

3-D Finite Element Analysis on Suture Marked Human Craniofacial Complex after RME and Maxillry Protration;

上颌快速扩弓及前方牵引作用下骨缝标识性颅面骨三维有限元研究

Clinical study of class Ⅲ malocclusion in early permanent dentition with rapid palatal and face mask therapy

快速扩弓加前方前牵引治疗恒牙早期安氏Ⅲ类错?的临床研究

Clinical study of maxillary protraction with rapid maxillary expansion in skeletal Class Ⅲ patients

上颌前方牵引联合快速扩弓矫治骨性Ⅲ类错畸形

Upper arch changes after maxillary protraction with rapid palatal expansion in skeletal Class Ⅲ patients by anchoring to the primary teeth

乳磨牙为支抗前牵引矫治后上牙弓变化的初步研究

Study of dento-alveolar changes of patients after treatment of combination of rapid maxillary expansion and maxillary protraction through three dimensional measurement

快速扩弓结合前方牵引对牙颌作用的三维测量研究

Effect of maxillary protraction with or without rapid palatal expansion in treating early skeletal Class Ⅲ malocclusion

早期骨性Ⅲ类错前方牵引矫治中扩弓效果的比较

Biomechanical study on 3-dimensional finite element model of maxillary protraction and the palate expansion

上颌前牵引联合腭部扩弓的三维有限元生物力学研究

Photoelastic Analysis of Open Bite Treatment Using Multiloop Edgewise Arch Wire (MEAW) and Reverse-curve Arch Wire with Vertical Elastics in Anterior Teeth Area and Their Applications;

多曲方丝弓及“摇椅形”弓丝配合前牙区垂直牵引矫治开（牙合）的光弹性研究及应用

Maxillary protraction in treatment of anterior crossbite in hard tissue

前牵引矫治前牙反对颅面硬组织影响的研究

An airplane propeller mounted in front of the supporting surfaces.

牵引螺旋桨安装在支承面前面的飞机螺旋桨

The Experimental and Clinical Studies of Midfacial Skeleton Protraction at Its Medium Position;

中位牵引前移面中份骨骼的实验与临床研究

Treatment of Skeletal Class Ⅲ Malocclusion with Modified Protraction Headgear and Edgewise Appliance

改良长拉钩前牵引器与方丝弓矫治器联合矫治安氏Ⅲ类骨性错?的研究

chain floor trolley

链条牵引的地面小车

A study of maxillary protraction and rapid palatal expansion on the treatment of growing patients with skeletal class Ⅲ malocclusion

上颌前牵配合快速扩弓治疗青少年骨性Ⅲ类错

Construction of Three Dimensional Finite Element Models of Human Craniofacial Complex and Biomechanical Study on Maxillary Protraction;

颅面复合体三维有限元模型的建立及上颌前牵引的生物力学研究

Hard Tissue Change of Skeletal Class Ⅲ Malocclusion After Protraction Headgear;

骨性反合前方牵引器治疗的颅面硬组织结构变化