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Noise Dosimeter NIOSH & OSHA
Tool Box: goniometer & ruler
精準測量工具箱
White & Pink Noise
分貝計（音頻頻譜分析儀）
Car Decibel Sound Level Meter
Guitar & Ukulele Tuner
Find a Cat
Light Meter - measure luminosity in lux, fc, lumen
Leo the Cat - Fun Stickers
音量計
