percussion mark
冲击压痕试验装置 impact indentation apparatus
锤击伤痕 hammer mark
术后并发症有虹膜出血、IOL表面细小击痕和玻璃体前界膜破裂，均对视力无影响。
The complications included iris haemorrhage, slight damage on the surface of IOL and breakup of anterior vitreous membrane, and they had no influence upon the vision.
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