The delayed elastic deformation stage came later, the bend deflection increased more quickly, and breaking life shortened with the increase of the prolongation of the maximum load hold time.
随着最大载荷保持时间的增加，塑木复合材料进入延迟弹性变形阶段越晚，弯曲挠度增加越快，断裂寿命降低。
So the increase of 12 years in maximum life expectancy during the 20th century was just one-third as large as the increase in average life expectancy during the period (36 years).
因此，20世纪最长寿命12年的增长幅度只不过是同期平均寿命增幅(36年)的三分之一。
Cold switching is desired to extend contact life. It can increase contact life by 10-1000 times over switching at maximum levels.
冷切换可以延长触点寿命，最大时可将触点寿命提高10 ~ 100倍。
Cold switching is desired to extend contact life. It can increase contact life by 10-1000 times over switching at maximum levels.
冷切换可以延长触点寿命，最大时可将触点寿命提高10 ~ 100倍。
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