To choose the point elasticity or the arcelasticity?
选择点弹性还是弧弹性？
2
First, we seek the origin of the elasticity and the invention of the point elasticity and the arcelasticity. We also search for their original paper respectively.
文中首先寻找弹性的由来始末，以及点弹性和弧弹性的产生过程，并各自找出它们的原始文献。
3
Determination of the bending strength of gear teeth of circular-arc profile gear is very difficult due to many unknown factors, which would be also a complicated problem in the field of elasticity.