Fatigue occurs when the interval of intermittent tetanic contractionof skeletal muscle is shortened to a certain degree and the contractile tension declines.
骨骼肌间断强直收缩期间，当刺激间隔缩短到一定程度时，收缩张力呈现逐步降低，即产生疲劳现象。
2
After false texturing the degreeof crimp, crimp contraction, crimp modulus and crimp stability of PBT/PET fiber are all in the optimum condition, the elasticity of its woven fabric can be over 23%.
Because of the always-outdated statistical data in the calculation of GDP contraction coefficient currently, we still adopt CPI indicators to measure the degreeof inflation.