The tectonic location, stress condition, sedimentary environment, sediment characteristic and wall rock condition are the elementary factors considered in loop bedding study.
研究环状层理必须综合考虑构造位置、应力条件、沉积环境，沉积特征、围岩条件等因素的影响和控制作用。
2
It is important to study fatigue stress - strain hysteresis Loop on cumulative fatigue damage.
研究疲劳应力应变滞后环对探讨疲劳积累损伤很重要。
3
Formula for approximative stress calculation of expansion loop is described with a design case cited.