BSWA309 噪音分析儀(Class 2)

BSWA309 噪音分析儀(Class 2) Class 2 1/1 Octave Sound Level Meter , with Type 2 micophone, with 4G microSD card, With carrying case, a 9-cm windscreen, 4 AA batteries, and calibration chart, Frequency Weighting of Parallel A, B, C, and Z

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