全部

1·The appearance of each square elbow presents a smooth cambered surface.

所述的直角弯头外表呈光滑的弧面。

2·Astigmatic microstructures contain several cambered surface transmission microstructures, each of the cambered surface transmission microstructures possess an arc convex surface.

散光微结构区包含数个弧面透光微结构，每一弧面透光微结构具有圆弧凸面。

3·Formula to evaluate translation of the tooth-surface and the equation to describe the generatrix of the negatively cambered sooth-surface were derived respectively.

分别推导得到齿面平移距离和内凹齿面母线方程的计算公式。

弧面

1·The appearance of each square elbow presents a smooth cambered surface.

所述的直角弯头外表呈光滑的弧面。