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to phrases
凸凹透镜
tū’āo tòujìng
stresses
tech.
выпукло-вогнутая линза
;
отрицательный мениск
凸凹透镜
发散透 镜
tū’āo tòujìng
tech.
отрицательный мениск
凸 凹 透镜:
7 phrases
in 3 subjects
Electronics
1
Military
1
Technology
5
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