BOUNDARY ULTRASONIC IDENTIFIER OF POSITION OF COORDINATES

摘要

A boundary ultrasonic identifier of position of coordinates on the Earth surface includes a body and piezoacoustic element immersed to earth in the lower section of the body. It cannot be moved without authorization due to its construction, and at absence of the outer section of the body on the Earth surface it makes possible to carry out its identification and accurate positioning by means of resonance ultrasonic method.