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Ultrasonic detectors (Dmgdebu)

Communication and control (D)
    Detection and identification (Dm)
        Detection and identification technologies (Dmg)
            Detectors (Dmgd)
                 Related Term (Associative): Identification systems (Dmbj)
                Types of detectors (Dmgde)
                    Acoustic detectors (Dmgdeb)
                        Geophones (Dmgdebg)
                             Use For: Velocity transducers
                             Related Term (Associative): Accelerometers (Gumpa)
                        Hydrophones (Dmgdebh)
                        Ultrasonic detectors (Dmgdebu)