Ltd by breaking through traditional cold-bending forming change on OD 114 mm high frequency welded pipe units.
上海申花钢管有限公司在114高频焊管机组上突破传统冷弯变形方法，设计出强力焊管。
2
With the increase of ionic potential, the dehydrated temperature and the bending vibration frequency of interlayer water increase, and strength vibration frequency decreases.
随着层间阳离子离子势的增大，其层间水脱失温度增高，层间水的对称伸缩振动频率降低，弯曲振动频率提高。
3
The bending vibration characteristic of a nonlinear cracked rotor is then analyzed. The time frequency characteristics of a cracked rotor after entering double cycle bifurcation are introduced.