random sampling without replacement
... 不对称阶乘设计 asymmetrical factorial design 不放回随机抽样 random sampling without replacement 不规则变动 erratic variation ...
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random sampling without replacement 不放回随机抽样; 不重复随机抽样 random shuffling and sampling 随机重排与抽样 ..
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This paper introduced several methods about the concrete strength inspection: the sampling method given by the present specification; simple random sampling without replacement; stratified sampling.
具体介绍了砼强度检测抽样的几种方法：现行规程抽样法；简单随机抽样法；分层抽样法。
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