Computer interface, alarm:
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Jet printer
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Removed, The USB flash drive is inserted
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Computer noise, Communication room
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Manual copy machine
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Disc read, Opens, closes the CD / DVD tray
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Double click computer mouse
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Room noise, read, write, Hard disk
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Turning on the computer, fan noise, shutting
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Office work, general noise
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Turn off the old computer, Turn on
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Photocopy (photocopy)
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Turn on, turn off the hard drive
★★★★★