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1·In this paper, the method of pulsating hydraulic test to relief retaining ring stress is introduced.

本文介绍用油压脉动方法调整护环的宏观残余应力。

2·The uneven distribution of loading, the clamping damage and the stress concentration were thought to be the three key factors influencing the fatigue test of steel strand with pulsating tensile load.

受力不均、夹持损伤和应力集中是影响钢绞线脉动拉伸疲劳试验的三个关键问题。