The steel axle of this kind of pig can bend under greater thrust force, it is helpful to pass through elbow or the section of converting pipe, so it can avoid efficiently block accident.
该清管器的钢轴能在较大推力作用下发生弯曲变形，有利于通过弯头或变形管段，可有效避免堵卡事故的发生。
2
Then the unified formulas for calculating sectional strength of the member are derived which are adaptable to both circular or ring cross section with thrust of big or small eccentricity.
最终导出了大、小偏心统一，圆、环形截面统一的正截面强度计算公式及方法。
3
It is shown that due to the presence of axial thrust and the gradual cracking of the section, a plain concrete element can deform significantly without losing its flexural strength.