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开环 [词典] ring opening; open loop; open cycle; [例句]在研究这一反应时，分别观察闭环和开环操纵情况是方便的。When considering this response it is convenient to look at closed-loop and open-loop control situations separately.闭环 [词典] closed loop; closed cycle; [例句]同时对仪表的闭环控制策略和Q值进行了研究。The closed-loop control strategy for instrument and Q value were researched
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