concaver凹面体
concaveadj.凹的n.凹面;凹线;凹形
concave circular sa凹面圆锯
concave head piston凹顶活塞
concave round plane凹底圆刨
concave preset lens前置凹面镜
concave filiet weld[机] 凹面堆角熔接
concaveconvex shape凹凸形状
concave motion rule凸图元运动规则
concave fillet weld凹角焊
concave filler weld凹角焊
concave programming凹形规划法