Lucas CEL Instruments Ltd. CEL-282 Acoustical Sound Level Calibrator

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CEL Instruments Ltd. CEL-282 Acoustical Calibrator

EXTECH SOUND LEVEL CALIBRATOR MODEL 407766 - 94db/114db Acoustical Decibel

CEL Instruments Ltd. CEL-282 Acoustic Calibrator Class 2 — 114 dB, 1 kHz Sound

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