concaver凹面体concaveadj.凹的n.凹面；凹线；凹形concave transition壁面凹过渡concave programing凹形规划法concave - convex凹凸concave polyhedron凹多面体concave arc length凹板弧长concave green belt凹式绿地concave line label[计] 凹线标号concave feed plate凹板喂入板Concave Work Blade凹弧形托板concave convex game凹凸对策