During oil recovery by rod pump, owing to the elasticstretching and shrinking of the tubing string, the stroke loss of the subsurface pump reaches 10%.
在有杆泵抽油过程中，因油管弹性伸缩，抽油泵冲程损失达10%以上。
2
Stretching an image could result in an elastic kind of resistance.
拉伸图片还会有伸缩弹性的感觉。
3
The orientation behaviour of molecular chains of hard elastic polypropylene(HEPP) film was investigated on the uniaxial stretching by polarized IR Vibration-Mechanical Spectroscopy.