The slotted pipe with narrow slots can be mass worked economically and efficiently by means of open loop system and hand automatic model shifter.
采用开环系统和手动、自动模式切换装置，可以经济、有效、大量地加工带有窄缝的割缝筛管。
If unexpected disturbances act upon an open-loop system, or if its behavior is not completely understood, then the output will not behave precisely as expected.
如果有不期望的扰动作用在开环系统上，或者如果其行为不能完全掌握的话，则该系统的输出就不会完全如预期般动作。
By the matching design method, the dynamical equations of dosed loop system can match those of the open loop system.
方法采用匹配设计方法，通过匹配条件，使开环系统与闭环系统的动力学方程匹配。
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