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潇湘材子

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[求助] 干缩增长率

混凝土的干缩增长率怎么计算出来的
比如14天增长率了,3d40,7d58,14d69这样的,应该14天干缩增长率怎么算?看晕了~
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2楼2012-12-29 19:40:12
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