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Scientific Instruments Used in the Geophysical-Geological Fields-Namely, Accelerographs, Seismic Sensors, Accelerometers, Seismic Triggers, Tiltmeters, Seismoscopes, Seismic Switch Accessory Panels; Graphic and Magnetic Recorders, Multi-Channel Photographic Recorders; Signal Conditioners, Galvanometers, Amplifier Filters, Digital Timers, Transducers; Time and Frequency Receivers, Antennae, Radio Frequency Transmitters and Receivers, Receiver Circuit Boards and Frequency Comparators; Motor Shake Tables and Instrument Housings; Together with Assemblies of Groups of the Foregoing with Software to Provide Timing, Detection, Transmitting, and Command Functions, Selection, Interpretation, Analysis and Storage of Seismic Data
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