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The K21 can travel as fast as 70 kilometers per hour on paved roads and cross a river at a speed of 7.8 kilometers per hour with the help of its water-jet propulsion system.
K21可以以每小时70公里的速度在铺设的道路上行驶，喷气推进系统能每小时加速7.8公里，以这速度可以穿越过一条河流。
This article introduces the frequency speed constant pressure water supply system controlled by PLC, presenting its hardware structure, the design of PLC program and its application.
介绍了用PLC控制的变频调速恒压供水系统的基本原理，给出了系统的电气线路和PLC程序设计，并在实际中得到了应用。
The adding system regards the slime water of the free district of the thickener as detecting target, sedimental speed as the feedback, form the close-circuit control system.
该添加系统以浓缩池自由区的煤泥水为检测对象，以沉降速度作为反馈量，构成闭环控制系统。
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