A granite platform (Granite Flat Panel) was a long-term natural aging, organizational structure, uniform, linear expansion coefficient is extremely small, internal stress disappear, not deformed.
花岗石平台（花岗石平板）经长期天然时效，组织结构均匀，线胀系数极小，内应力完全消失，不变形。
The kinetic curves properties response aging time and temperature were obtained with the coefficient of compression stress relaxation as index of aging property change.
用压缩应力松弛系数作为老化性能变化指标，得出了性能随老化时间和温度变化的动力学曲线。
After aging treatments, the strength coefficient reached 72.5%.
经过时效处理接头强度系数提高到72.5%。
After aging treatments, the strength coefficient reached 72.5%.
经过时效处理接头强度系数提高到72.5%。
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