From multiscale edges detection, the conclusion is drawn that in certain scale, circular defect is considered as crest edge in two directions, and bar defect in one direction.
从多尺度边缘检测的角度分析得出：在一定尺度下，圆形缺陷在两个方向上都看作是屋脊边缘，而条形缺陷只在一个方向上被看作是屋脊边缘。
There were bony defect and sclerosis on the vertebral body edge.
椎体后缘有骨性缺损，缺损边缘硬化。
The surface of the syringe must be clear and pure; rough edge, burr, plastic stream, defect are not allowed.
注射器表面必须清洁无杂质，不得有毛边、毛刺、塑流、缺损等缺陷。
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