| 摘要 |
FIELD: acoustic systems. ^ SUBSTANCE: device has synchronizer, radio-frequency pulse oscillator, frequency divider, switchboard, electroacoustic transducer, two amplitude-limiting amplifiers, amplitude detector, frequency multiplier, phase detector and indicating unit. Oscillator and amplitude modulator units are additionally introduced into design. ^ EFFECT: high reliability; increased resolution; reduced dead zone area. ^ 5 dwg
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