concave

C 开头单词托福词汇 GRE词汇

短语词组

短語

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