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Introduces the application of PC programmable controller at uniflow high-speed elevator, and the principle of controlling uniflow high-speed elevator.

介绍PC可编程控制器及其在电梯上的应用,及电梯的控制原理。

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The pulse pump is a new-type pump, in which the fluid successively flows out in one direction by means of the pulse effect in the uniflow pipe.

泵中,量转换效率,级扬程范围较广。泵出连续、量较大而无气蚀危险。

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