concaveadj.凹的n.凹面;凹线;凹形
concave plane凹底刨,凹平面
concave cover凹形盖
concave crown凹顶
concave angle凹角
concave slope凹坡
concave slide凹槽载片
Concave shape凹形
concave grate凹板筛,凹板栅格
concave joint凹缝
concave tooth凹面齿