concave and convex operator 凹与凸算子
Spherical Concave and Convex Mirrors 球面凹面镜
convex and concave function 凸函数
raised and convex-concave 凸凹模造型
convex and concave block 凸凹形块体
convex and concave property 凸凹性
convex and concave functions 凸函数和凹函数
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。
Methods Hypermetropia and myopia were induced by playing concave and convex lens in front of eyes of 32 subjects.
方法在正常眼前放置正、负球镜，人工诱导单纯性远视、近视性屈光参差。
Our research has resulted in the development of a processing technique and equipment for processing stone products with concave and convex surface.
研究开发了石材内外曲面制品的加工工艺及其加工机床。
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