| 摘要 |
signalling and calling arrangements. SUBSTANCE: device has radio transmitter, multivibrator, level transducers with sensitive members, relay, power supply sources, master oscillator, telegraph sending key, modulating code oscillator, phase manipulator, transmitting aerial, radio receiver, receiving aerial, search unit, mixer, conversion frequency source, finder unit, unit for measuring bandwidth, threshold unit, keys, delay line, acoustic signal unit, phase detector, recording unit, unit for measuring frequency, frequency detector, trigger, balance switcher. The device has feature for stabilizing reference voltage phase selected from the received signal. EFFECT: high accuracy in determining flood or mud flow occurrence place. 2 dwg
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