very low frequency (VLF)
дуже низька частота (від 10 до 30 кгц)
дуже низька частота (від 10 до 30 кгц)
very low frequency (VLF) radio
very high-frequency omnidirectional range / omnirange (VOR)
very high-frequency omnirange / omnidirectional range (VOR)
pulse repetition frequency (PRF) / pulse-repetition frequency
low-pulse repetition frequency
low-pulse repetition frequency radar
low-pulse repetition frequency waveform
low-RCS target / low-radar-cross-section target