9 Apparatus and instruments for measurement, control and signaling, namely, ground penetrating radar, radar detectors, metal detectors, radar receivers with amplifiers, computers, and lasers for measuring purposes; electronic devices and instruments for locating of metallic and nonmetallic objects in the ground, in hollow spaces, and underwater, namely, ground penetrating radar, radar detectors, metal detectors, radar receivers with amplifiers, computers, and lasers for measuring purposes; data processors and computers for application in analysis of data by position finders and tracking systems for locating of metallic and nonmetallic materials as well as hollow spaces; electronic indicator panels; apparatus and instruments for archaeology, namely, ground penetrating radar, radar detectors, metal detectors, radar receivers with amplifiers, computers, and lasers for measuring purposes; batteries and accumulators; instruments for monitoring, namely, LCD- and TFT-displays or video glasses; stored operating programs for computers with respect to ground radar; blank magnetic data carriers and optical communications instrument and components, namely, optical data links; electrical coils; electromagnetic coils; apparatus for recording of distances, namely, ground penetrating radar, also with the use of GPS receivers, and containing range finders, radar detectors, metal detectors, radar receivers with amplifiers, computers, and lasers for measuring purposes; devices for telemetry, namely, HF radio transmitters; two-way-radios; printed circuits for mounting in electronic devices; altimeters; computer interface boards; measurement devices, namely, calibration checkers; metal detectors for commercial and military uses; radar equipment, particularly ground radar equipment