At the exhaust gas dilution condition, the burning duration is extended and the flame speed drops faster at high initial pressure than at low one.
在废气稀释情况下，燃烧时间延长，在高初始燃烧压力时，火焰传播速度下降更明显。
Results There were significant differences in blood loss volume, duration of operation, hospital stay and anal exhaust time between laparoscopic surgery group and laparotomy group(P<0.05).
结果腹腔镜手术组与开腹手术组术中出血量、手术时间、住院时间和术后排气时间比较，差异均有显著意义（P<0.05）。
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