The value of tightening torque is relative not only to the nominaldiameter and quality class of the bolt, but also to the security of the threaded fastener.
指出螺栓联接的扭紧力矩值不仅与螺栓的公称直径及性能等级有关，还与能否保证联接可靠工作有关。
2
Compared to the new wheel tread, the worn tread is easy to form two-point contact nearby the depression area of the nominaldiameter position of wheel tread.
与新用车轮踏面相比，测试得到的磨耗后车轮踏面在其名义直径位置凹陷区域附近容易形成踏面两点接触。
3
Nominaldiameter and flow valves, basically the same breath for full-bore type, Circulation than nominaldiameter valve is given. it small called non-reducing type.