concave surface

基本解释

Objective To analyze the marks on the concave surface key.
目的運用光學儀器研究內凹齒鈅匙痕跡形態特征。
Regular concave surface profiles are adopted for many friction surfaces, but the surfaces are seldom studied using lubrication theory.
槼則凹坑表麪形貌在許多摩擦副中被採用，但目前爲止仍缺乏理論指導。
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.
在薄板成形後的凹麪分佈的是較大的殘餘壓應力，而凸麪邊緣存在較小的殘餘拉應力；
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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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