无裂缝和缝隙接触面。

Crack and crevice-free contact surfaces.

金属线没有足够大的接触面来引起大爆炸。

The wires do not have a large enough surface to catalyse a big explosion.

给出了一种基于接触面几何的接触问题解法。

A solution for contact problem based on contact surface geometry is presented.

假设该接触面为一个边长为0.75米的正方形。

Suppose the contact makes a square about 0.75 meters on a side.

假设当两个接触面处于相对滑动的临界状态时，切向力与垂向力成正比。

Provided two contact bodies are in the critical state of relative sliding, the tangential force is proportional to the vertical force.