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Sound Level Calibrator 114dB / 94dB / 104dB Audio Noise Meter High Frequency ±0.4dB Accuracy 13.2mm (½") Microphone Mic Size: Amazon.com: Industrial & Scientific
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Applied XR-3 Satellite Meter, Antenna, CATV Installer Test Set – TesCom Test Equipment Sales, Repair, and Calibration
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Sound Level Calibrator 114dB / 94dB / 104dB Audio Noise Meter High Frequency ±0.4dB Accuracy 13.2mm (½") Microphone Mic Size: Amazon.com: Industrial & Scientific
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