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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Amplifiers of electromagnetic waves:

MASERS: Devices for amplifying electromagnetic waves
LASER: Electromagnetic-wave amplifier
MASER: Device amplifying electromagnetic waves
MASER: Electromagnetic wave amplifier
MASERS: Electromagnetic wave amplifiers
LASERS: Amplifiers of electromagnetic waves
MASER: Amplifier of electromagnetic waves