However, stepped aging, which relaxes internal macro-stress under lower temperature then ages under higher temperature, can avoid longitudinal cracks effectively.
分级时效处理，低温下先让合金内部的宏观应力松弛，再在较高温度下时效，可有效地避免棒材纵向开裂。
The results demonstrate that the thermal stress could meet the design criteria even without longitudinal joints so long as placement temperature is controlled reasonably.
计算分析表明，只要合理控制浇筑温度，即使不设纵缝，坝体温度应力也能满足设计要求。
Temperature Stress in open reinforced concrete pressure pipe usually is one of the important reasons why their longitudinal cracks-occur in use.
外露式钢筋混凝土压力管道的温度应力，常是某些这类管道在运用期内产生纵向贯通裂缝的重要原因之一。
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