Diameter tolerance ovality and average decarburized layer depth 偏圆度及脱碳层的平均深度
2.
Tolerance of wire diameters ovality 圆径及偏圆度之公差
3.
The result shows that the dimension ' s decreasing of polar plate can make the level of stress and strain decrease during hydrobulging and the spherial vessels with smaller ovality can gained 结果表明：在桔瓣数目一定的情况下，减少极板尺寸可以降低多而壳体成形过程中应力应变水平，并得到不圆度小的球形容器。
4.
Tpih ( tube - bending process using local induction heating ) , used as a new process method to prevent the producing of unequal distribution of the wall and ovality in the tube , has been widely applied in fields of petroleum chemical industry , light industry , pipe engineering , aeronautics and astronauts industries , etc . 加热弯管是防止管材弯曲截面形状畸变与壁厚不均匀的一种新的工艺方法，广泛的应用于石油化工、轻工、管道工程、航空航天等工业部门。
5.
3d numerical simulation of finete element method ( fem ) program is used to calculate and analyse the distribution of stress and strain during hydrobulging , the ovality of single - curvature polyhedron after being hydrobulged while the dimension of polar plate of single - curvature polyhedron without the flaw of imaginary crack changes 摘要利用三维数值模拟方法，对假想无裂纹的单曲率多面壳体模型上极板尺寸发生变化时胀形过程中应力应变的分布、胀形结束后多而壳体的不圆度等进行了计算和比较。
