Results demonstrate the following optimum conditions for low-shrinkage sliver: hot stretch ratio of breaking machine, 1.

结果表明获得较低缩率的最佳工艺条件是：拉断机热拉伸倍数为1。

youdao

By employing the characterization methods of X-ray and DSC, this paper conducts a research on films of different stretch ratio.

通过X—射线、DSC等表征手段，我们对不同拉伸程度的薄膜进行了研究。

youdao

The results show that the optimal bottle performance requires modified screw, processing parameter, parison design and stretch ratio.

结果表明，为了得到理想的制品外观和性能，需要对挤出螺杆、加工工艺参数、型坯设计和拉伸比进行改进。

youdao

However, when you think about it, a low student-teacher ratio goal, is specifically a low-productivity goal inconsistent with productivity increases needed to stretch scarce tax and tuition dollars.

FORBES: Why Fixing America's Schools Means Increasing Teacher Productivity