concave-convex soil 凹凸棒土
concave-convex curve 凸凹曲线
concave-convex system 凹凸镜系统
trajectory concave-convex 轨迹凸凹性
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。
Concave-convex thermo-printing of various high-grade and fine printed products can also be conducted on this machine for obtaining stereoscopic exquisite and beautiful packing and decorating products.
各种高级精细的印刷品均可在本机上进行烫印，以获得富有立体感，精致美观的包装，装潢制品。
Because there is no abrasion between the concave and convex, the nut is reusable.
由于凹面与凸面之间没有磨损，螺母可以重复使用。
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