Objective: to reduce bleeding during the cheiloplasty and make convenient the operation practice, so to shorten the operation time and diminish the operation risks.
目的：为了减少唇裂修复术中出血，便于手术操作，缩短手术时间，相对地减少手术的危险性。
It is shown that the limestone powder with appropriate particle distribution can improve the fluidity of concrete, reduce bleeding rate and shorten the setting time.
试验结果表明：一定颗粒分布的石灰石粉能改善新拌混凝土的流动性能，减少泌水率及缩短凝结时间。
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