concave perforation rate [农机] 凹板透孔率
rate of perforation [计] 穿孔速度
perforation E rate 穿孔速度
Preservation rate of perforation marks 炮眼痕迹保存率
perforation å rate 穿孔速度
perforation U rate 穿孔速度
Conclusions the application of DSAK in lateral window maxillary sinus lifting could shorten the surgery time obviously with low membrane perforation rate and slighter postoperative reaction.
结论应用新型上颌窦提升工具进行上颌窦外提升术较普通球钻手术时间明显缩短，黏膜穿孔率低，患者术后反应轻，高效安全。
Perforation and death rate were respectively 5.6% and 4%.
穿孔率和死亡率分别为5.6%和4%。
Between 1 October and 10 December 2004, 615 severe cases with peritonitis, with or without perforation, including 134 deaths (case fatality rate, 21.8%) have occurred.
从2004年10月1日至12月10日，已发生615例伴有穿孔性或非穿孔性腹膜炎的严重病例，其中包括134例死亡(病死率为21.8%)。
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