The calculation model of thermal wake characteristics of submarine in stratified flow is established in this paper.
建立了在密度分层环境中热尾流特性的计算模型。
This paper introduced the characters and the effect of coal saving of three - roller stratified coal feeding devices in operation.
文章介绍了三辊式分层给煤装置在使用中的特点以及节煤效果。
This paper discusses cluster sampling and stratified cluster sampling in continuous surveys with censuses.
本文讨论了连续调查中应用普查方法时的整群抽样和分层整群抽样。
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