concave
短语词组
- concave grating 凹面光栅
- concave slide [光]凹玻片;凹槽载片
- concave refractor 上凹折射层
- concave domain 凹型区域
- concave share 凹形犁铧
- concave frame 凹板骨架
- geosynclinal concave 地槽凹
- concave cam [机]凹形凸轮
- concave transition 壁面凹过渡
- concave mirror n . 凹透镜
- concave surface 凹面，内弧面
- concave lens 凹透镜；近视镜片
- concave bank 凹河岸；冲刷河岸 返回 concave