concave-convex

基本解释

The outside wrapping remarkable position uses the paper laser forgery-proof to hit the sign, has the concave-convex feeling with hand touching.
外包装显著位置采用纸质激光防伪打标，用手触摸有凹凸感。
The concave-convex hammering lines formed on the surface of the front side aluminium plate are strong in stereo dimension, and elegant and beautiful in appearance.
在正面铝板表面设置有凹凸的锤印纹，立体感强，高雅大方，外表美观；
ip.com
Speedup convergence of the step-by-step iterative method of GM(1,1) optimal model is defined, the concave-concave-convex features of which are well coincided with the original data sequence.
逐步迭代法GM（ 1，1）模型不仅收敛速度快，而且与原始数据序列的凹凸性保持一致。