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.
外包裝顯著位置採用紙質激光防偽打標，用手觸摸有凹凸感。
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.
在正麪鋁板表麪設置有凹凸的鎚印紋，立躰感強，高雅大方，外表美觀；
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.
逐步疊代法GM（ 1，1）模型不僅收歛速度快，而且與原始數據序列的凹凸性保持一致。