vacuum tube rectifier

space

U+0020

latin small letter a

U+0061

latin small letter b

U+0062

latin small letter c

U+0063

latin small letter e

U+0065

latin small letter f

U+0066

latin small letter i

U+0069

latin small letter m

U+006D

latin small letter r

U+0072

latin small letter t

U+0074

latin small letter u

U+0075

latin small letter v

U+0076