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вакуумная лампа stresses
el.mach.	真空管 (shinkū-kuda)
phys.	真空電球 (накаливания, shinkū-denkyū)
вакуумная электронная лампа
tech.	真空管 (shinkū-kuda)

вакуумная лампа: 1 phrase in 1 subject

Technology

1