某闭环调速系统的调速范围是 1500 ~ 150r/min, 要求系统的静差率 s ≤ 2% ,那么系统允许的静态速降是()
A.
3.06r/min
B.
4r/min
C.
4.13r/min
D.
以上结果都不对
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【简答题】Thereafter , we waved to each other in a friendly greeting when I passed his shop every day . At first I went in only when I had repair work to be done . Then I found myself lingering in his store or ...
【简答题】Thereafter, we waved to each other in a friendly greeting when I passed his shop every day. At first I went in only when I had repair work to be done. Then I found myself lingering in his store or dro...