Glass bottles on a conveyor line, room noise:
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Box making machine
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Factory atmosphere, drone in a mine tunnel
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Room noise, Glass bottles on a conveyor line
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Turn off, Air compressor turn on
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Air blow, Air compressor
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Standby, Forklift, on, off
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Steam pump
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Grind metal on a grinding machine in a
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Signal for lunch at the factory
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Electric welding
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Low frequency running engine
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Electric industrial motor
★★★★★