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本文系顾淦臣同志应河南省水利学会黄委会分会邀请所作的学术报告。应读者要求,本刊将分期刊登。
This article is an academic report by Comrade Gu Ganchen at the invitation of the Yellow River Branch of Henan Provincial Hydraulics Society. At the request of readers, this publication will be published in installments.