Old computer keyboard:
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Laser printer
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General noise, Office work
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Photocopy (photocopy)
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Hard disk, room noise, read, write
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Computer mouse click
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Turning on the laptop, shutting, fan noise
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Computer interface, signal read information
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Matrix printer
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Turn on, turn off the hard drive
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Jet printer
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Signal, Modem connection, interference
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Opens, closes the CD / DVD tray, disc read
★★★★★