This abac can reflect the designing and machining level of China.It also provides the idea and method for the making of conversion curves for our industrial usage.

• 在此基础上，选定能较好反映粘性输送时离心油泵性能变化规律的凖则数，初步制作了能反映油泵水力设计及加工水平的性能换算诺莫图。