结合伊朗塔里干电站项目，将普通尾水管改型设计成窄高型尾水管。
Combined with the Taligan Powerplant Project of Ir an, common draft tube is remodeled to high-and-narrow type draft tube.
本文介绍有关推广应用12a窄高型尾水管的试验研究成果，给出了应用12a肘管和确定具有该肘管的尾水管主要几何参数所必需的一些数据。
Some data which are necessary for using elbow 12a and determining the main geometric parameters of the draft tubes with elbow 12a are given.
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