Objective To study the effect of rapid traction of flexion or stretch for the cases with L4~5 and L5~S1 of lumbar disc herniation.
目的应用成角快速腰椎牵引床将腰椎处于屈曲或背伸的状态下牵引，对L4～5和L5～S1椎间盘突出症的疗法进行临床研究。
Objective To evaluate the therapeutic effect of rapid angulation rotation traction for lumbar intervertebral disc protrusion.
目的评估成角旋转快速牵引治疗腰椎间盘突出症的临床疗效。
When combined with the computer program of train traction calculation, the model can be embedded to build an efficient simulation system with rapid data-exchanging ability.
将其与牵引计算程序相结合，可用于构建一个具有快速数据交换能力的实用仿真平台。
Methods Based on the former instrument for rapid tiny-hurt traction, reposition and fixation of fracture of zygomatic bone, various aspect have been improved.
方法：在自行研制的颧骨颧弓骨折微创快速牵引复位固定器基础上，进行多项改进。
With the rapid development of subway, it is necessary to consummate the protection for DC traction power supply system.
随着城市地铁的大力发展，研制更加完善的直流保护正是应时之需。
With the rapid development of subway, it is necessary to consummate the protection for DC traction power supply system.
随着城市地铁的大力发展，研制更加完善的直流保护正是应时之需。
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