目的探讨强直性脊柱炎后凸畸形全脊椎楔形截骨矫正术后并发应激性溃疡的相关因素及预防措施。
Objective: to investigate the intrinsic factors and prophylaxis methods of stress ulcer after Wedge-shaped osteotomy surgery correction of total spine of ankylosing spondylitis kyphosis deformity.
在板坯轧制过程中，由于某些因素的影响，使板坯在粗轧阶段的工艺参数发生变化，如冷却不均匀，使板坯两侧存在温度差、板坯具有楔形及在咬入过程中偏离轧辊中心线等，都会使板坯产生侧弯现象。
In bar rolling process, the technical conditions of roughing may change and make camber occurred, for example, different temperature at both bar side, bar wedge and off-center in biting.
本文主要讨论由上述因素引起的入射角、折射率、楔形度、厚度与曲率半径的比值对光学角偏差的影响，以利于生产工艺的控制。
The article mainly discusses optical angular deviation affected by angle of incidence, curvature, refractive index and unparalleled faces in order to modify the windscreen processing.
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