Then we get out normal group and model set L4 vertebrae′s stress relaxation, creep data and curve.
得出了正常对照组和模型组L4椎骨应力松弛，蠕变数据和曲线。
To study normal white rat osteoporosis L4 vertebrae telescope viscoelasticity property caused by vitamin A acid, supply bioviscoelastic mechanics parameter with clinic.
研究正常大鼠椎骨和维甲酸所致大鼠骨质疏松L4椎骨的粘弹性性质，为临床提供生物粘弹性力学参数。
RESULTS: the creep of lumbar vertebrae L4 cancellous bone exhibited significantly changes in the first 600 seconds, with stress slowly decreased and strain gradually increased.
结果：L4椎体松质骨蠕变在最初600 s内变化最快，之后应力缓慢下降、应变缓慢上升。
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