On the optimumdiameter problem of3 to 5 blade B-propellers, the new diagrams are compared with the old ones.
文中还就最佳直径问题，将新图谱与以前发表的三叶至五叶B型螺旋桨图谱作了比较。
2
On the basis of the existing parameter of an agitator, by calculating the strength and rigidity of the hollow shafting in an agitator, we get the optimumdiameter of the axle.
在搅拌器现有参数的基础上，通过对搅拌器空心轴的强度及刚度计算，得出了空心轴的最佳直径值。
3
Meanwhile, the economic flow rate, optimumdiameter and economic insulating layer thickness of the equipment and pipeline have been obtained with the model, which provide a basis for pipeline design.