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Radio transmitter-receivers, aeronautical
Radio receivers, facsimile (fax)
Radio receivers, vehicle
Background music systems
Microphones, ruggedised
Microphones, stand type
Microphones, lapel
Microphones, throat
Headphones, moving coil
Headphones, moving iron
Headphones, double impedance
Headphones, helmet type
Tapes, magnetic recording
Head cleaning cassettes for video equipment
Cassette recorder-players, mono
Cassette recorder-players, stereo
Tape recorders, high fidelity (hi-fi)
Tape recorders, personal
Tape recorders, portable
Tape recorders, battery operated
Tape recorders, professional
Cassette players, stereo
Cassette players, mono
Oscillators, femtosecond
Oscillators, VLF
Oscillators, UHF
Oscillators, VHF
Oscillators, SHF
Oscillators, EHF
Oscillators, RF
Oscillators, microwave
Oscillators, surface acoustic wave
Oscillators, tuning fork
Oscillators, variable
Oscillators, frequency swept, wobbulators
Oscillators, fixed frequency
Oscillators, multi-frequency
Oscillators, beat frequency
Oscillators, voltage controlled
Oscillators, blocking
Oscillators, multiphase
Oscillators, multivibrator
Oscillators, modulated
Oscillators, relaxation
Oscillators, highly stabilised
Oscillators, extended interaction
Oscillators, low distortion
Oscillators, bridge
Oscillators, (piezoelectric) crystal
Oscillators, decade
Oscillators, resistance-capacitance
Oscillators, miniature
Oscillators, transistorised
Oscillators, tropicalised
Oscillators, battery operated
Clock generators for digital circuits
Compressive receivers, spectrum analysis
Opening and closing mechanisms and controls for canal sluice gates
