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WN: 03215337-n
凹透镜
like: 凹透镜
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凹透镜 [ao1 tou4 jing4]
☊
concave lens ☊
/lentille concave/
☊
/lentille concave/
☊
凹透镜 [ao1 tou4 jing4] ☊ 
concave lens ☊ 
/lentille concave/ ☊ /lentille concave/ ☊ 
凹透镜 凹透镜 [ao1 tou4 jing4] ☊ concave lens ☊ /lentille concave/ ☊ /lentille concave/ ☊