concave surface

基本解释

Objective To analyze the marks on the concave surface key.
目的运用光学仪器研究内凹齿钥匙痕迹形态特征。
Regular concave surface profiles are adopted for many friction surfaces, but the surfaces are seldom studied using lubrication theory.
规则凹坑表面形貌在许多摩擦副中被采用，但目前为止仍缺乏理论指导。
It was found that there was large residual compress stress on the concave surface of metal-sheet, but low residual tensile stress on the fringe of convex surface.
在薄板成形后的凹面分布的是较大的残余压应力，而凸面边缘存在较小的残余拉应力；
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Cool Earth's insight was that if you coat only one half of a balloon, leaving the other transparent, the inner surface of the coated half will act as a concave mirror.
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