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optical efficiency
stresses
astr.
оптическая эффективность телескопа
;
светосила
(телескопа)
tech.
оптическая эффективность
;
светосила
Optical efficiency
energ.ind.
оптический КПД
(
AK67
)
optical efficiency
:
4 phrases
in 4 subjects
Electronics
1
Makarov
1
Mass media
1
Military
1
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