| | 凹地 concave ground | | 凹地带 hollow zone | | 凹坑 pit | | 凹垫圈 cupped washer | | 凹壁 recess | | 凹多边形 concave polygon | | 凹多面体 concave polyhedron | | 凹头螺钉 socket screw | | 凹岸 cutbank | | 凹底 kick | | 凹底刨 concave plane | | 凹底平车 well car | | 凹底车 trestle | | 凹度 concavity | | 凹度容差 valley tolerance | | 凹斑 pit | | 凹映射 concave mapping | | 凹曲度 concave curvature | | 凹曲线 sag vertical curve | | 凹曲线饰 hypophyge | | 凹板 notch board | | 凹椅座 dropped seat | | 凹榫 blind mortise | | 凹榫槽 sunk coak | | 凹槽 indentation |
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