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падающие лучи stresses
opt.	die auffallenden Strahlen
падающий луч
avia.	direkter Strahl
el.	einfallender Strahl
metrol.	Einfalltssrahl n
quant.el.	Einfallstrahl m
падающей луч
cinema.equip.	Einfallsstrahl m

падающие лучи: 4 phrases in 4 subjects

Astronomy	1
Optics branch of physics	1
Quantum electronics	1
Radio	1