题目内容
单作用式叶片泵通过改变转子中心和定子中心的偏心距就能改变输出流量的大小。
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使用可调节流阀进行调速时，执行元件的运动速度不受载荷变化的影响。
_________ is a disciplined activity that that attempts to describe, study, analyze, justify, interpret, and evaluate a work of art.
________ formulates the theories, principles, and tenets of the nature and value of art.
It should be mentioned that some of the theorists and critics would use the word "______" to indicate the body of theories and principles about the distinctive features of literature in general.
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