在基本假设的条件下，导出了筒形离心式通风机筒壳内气体流动速度的近似计算公式。
With the condition of the basic hypothesis, the approximate calculation formula was worked out on the gas folwing speed in the tubular centrifugal ventilator.
浑水泥浆泵是单级单吸立式离心泵，主要螺杆泵部件有蜗壳、叶轮、泵座、泵壳、支撑筒、电机座、电动机等组成。
Sewage slurry pump is single stage single suction vertical centrifugal pump, the main components are volute, impeller, pump base, pump casing, support tube, motor base, motor and other components.
本文简述了利用自吸筒来替代离心泵水下底阀，以解决离心泵气缚现象的工艺设计。
This article briefs the process design of the replacement of centrifugal pump's underwater bottom valve by self-absorption cylinder so as to solve the aerial binding phenomenon with centrifugal pumps.
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