问题
问答题 简答题
某台12sh型离心泵的铭牌上各给定的参数为：在最高效率时：Q=684立方米/小时，H=10米，N=1450转/分，求该泵的比转数ns=？
答案
参考答案：
解：由于sh型是双吸式离心泵，砼采用Q/2代入
ns=3.65NQ÷3/4H=3.65×1450×（684/2）×（1/3600）÷10*（3/4）=67
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某台12sh型离心泵的铭牌上各给定的参数为：在最高效率时：Q=684立方米/小时，H=10米，N=1450转/分，求该泵的比转数ns=？
参考答案：
解：由于sh型是双吸式离心泵，砼采用Q/2代入
ns=3.65NQ÷3/4H=3.65×1450×（684/2）×（1/3600）÷10*（3/4）=67
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| Twelve years ago, my mother gave birth to the most beautiful little girl. 1 , we were later given the 2 that this little girl, who was three and a half months old, would only have 14 days on earth. It's hard to understand what kind of 3 you have when you find out they you're 4 something that you don't even know. As time went on, the number of days kept growing, which gave us 5 .When the doctors said that we could take her home, that was 6 reality hit. We had no 7 . I am from a small town with small hospitals, but when you don't have money, you just don't 8 it. My mother tried for days to get the money, but nothing 9 each time. A caseworker(社会工作者)was even doing her best. It's 10 that it almost felt as if we had to 11 a baby from the hospital. One day the caseworker walked into her boss's office to 12 again. As she walked out, 13 down yet again, out of no where a man walked up to her. He 14 her a handful of money and said, "please give this to the lady in 15 , so she can take her daughter home." She looked down at her hand with tears in her eyes. As she looked back up to thank him, he was 16 . They searched all over the hospital and he was no where to be 17 . Thanks to the guy that I will 18 know, we could take home that 19 baby girl that was only given 14 days to live, and celebrated her 12th birthday yesterday. I am grateful to this man and feel that his act of 20 should be shared with everyone. | ||||
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