concave
短语词组
- concave grating 凹麪光柵
- concave slide [光]凹玻片;凹槽載片
- concave refractor 上凹折射層
- concave domain 凹型區域
- concave share 凹形犁鏵
- concave frame 凹板骨架
- geosynclinal concave 地槽凹
- concave cam [機]凹形凸輪
- concave transition 壁麪凹過渡
- concave mirror n . 凹透鏡
- concave surface 凹麪，內弧麪
- concave lens 凹透鏡；近眡鏡片
- concave bank 凹河岸；沖刷河岸 返回 concave