Traction frame from a special aluminum alloy Liuleng tube (with rebar) and high-pressure malleable aluminum fastening combination of stainless steel or aluminum rails;
2
目的:观察均衡牵引架牵引对腰椎间盘症突出症的影响,并进行力学分析。
Objective: To investigate the effect of balanced traction for treating Lumbar disc Herniation and discuss its mechanical principium.
3
她的经历让我着迷:她曾体验过牵引式飞行,由一架超轻型飞机牵引着飞行到2000英尺的高空。
She'd been flying towed tandem flights, pulled up to 2, 000 feet behind an ultralight.