concave-concave  两面凹陷的; 双凹的

concave downward‘ concave down  向上凸的; 凹向下的

concave-up concave-down  上凹下凹

plane-concave lens (=plano-concave lens)  平凹透镜

“concave” type  异常终止出口; h-层状自适应边界元方法

0-diagonally concave relation  0－对角凹关系

Abney mounting for concave grating  阿布饰凹面光栅装置

absolutely concave function  工程量清单报价; 严格凹函数

An are equi-uniformly u0-concave operators  诸An等度

annular concave spherical surface  凹球面环状

belt conveyor + concave segment + curvature radius  带式输送机+凹弧段+曲率半径

bi-row concave ridge  双行凹型垄

blade with concave surface  凹形铲刀

central concave abrasive  中凹磨损

characteristic concave or convex of surface  相图凹凸性

Circular concave sound source  凹口球形声源

cold extrusion concave die  冷挤压凹模

Combination Concave Die  组合凹模

combined concave mold  组合凹模