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concave lens
agric. 凹面透镜
desert. 凹面透镜体
met. 凹透镜
nurs. 凹球镜片
phys.sc. 凹〔负,发散〕透镜
tech. 透镜; 凹镜头
concave lens: 12 phrases in 6 subjects
Cartography1
Electronics2
Metallurgy3
Nursing1
Oil / petroleum1
Technology4