The SPRD is used on zone systems when the automatic closing of various zone dampers can create an excessive increase in air pressure and velocity throughout the duct system.
SPRD旁通阀是当各种区域风门自动关闭时用在区域系统中，可以在管道系统中增加空气压力盒速度。
Morever and from south to north and from east to west, the velocity and distance of rift opening became smaller and the velocity of rift closing faster.
而且裂谷从南到北，从东到西，拉张的速度、距离变小，而闭合速度变快。
Application Cavitation, liquid hammer and pressure peak may occur in hydraulic systems with changes in flow velocity, e. g. fast closing of a valve or pump starts and stops.
应用空化，液体铁锤和压力顶峰可能用在流动速度方面的变化在液压系统里发生，例如一阀门或者泵的快关闭起停。
The effects of coil resistance and the number of turns to operating mechanism closing time and moving velocity of the iron core are simulated and analyzed.
通过改变线圈电阻和匝数两个参数，分别仿真分析了线圈电阻和匝数的改变对于操作机构合闸时间及动铁芯运动速度的影响。
The effects of coil resistance and the number of turns to operating mechanism closing time and moving velocity of the iron core are simulated and analyzed.
通过改变线圈电阻和匝数两个参数，分别仿真分析了线圈电阻和匝数的改变对于操作机构合闸时间及动铁芯运动速度的影响。
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