The Cd increased with the depth-width ratio of notch cross-section, and increased to some extent with the hydraulicdiameter of notch cross-section.
流量系数随矩形节流槽截面深宽比增大而增大，并随截面水力直径增大而有所增大。
2
A pretension method for major diameter bolts using hydraulic stretching equipment is introduced.
介绍了一种大直径螺栓的预紧方法液压拉伸预紧法。
3
In addition, the company's hydraulic motors will drive 32 special tires that contact the 648-foot diameter wheel, making it rotate at a constant speed of three times an hour.