问题
问答题 简答题
简述排污水泵耗用功率过多的原因有哪些？
答案
参考答案：
（1）填料压得太紧
（2）叶轮与密封环磨擦
（3）流量过大
（4）水泵与电机不同心
（5）转速太高
（6）泵轴弯曲，轴承磨损或损坏过大
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简述排污水泵耗用功率过多的原因有哪些？
参考答案：
（1）填料压得太紧
（2）叶轮与密封环磨擦
（3）流量过大
（4）水泵与电机不同心
（5）转速太高
（6）泵轴弯曲，轴承磨损或损坏过大
My uncle is a farmer. He has ninety trees on his farm. My uncle and my can’t pick(采摘) all the apples in fall(秋天). they ask my parents and me to them every year. It’s Sunday. My parents don’t go to and I don’t go to school. So we’ll go to the . We get up early(早) in the . My mother is in old clothes. My father buys many kinds of food for my uncle’s in a shop. She likes them very much. My uncle and aunt us many apples, too. I like to work on the farm.
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