Floppy disk reading:
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Room noise, read, Hard disk, write
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Turn off the hard drive, Turn on
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Office work, general noise
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Repeatedly pressing a computer mouse
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Communication room, computer noise
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Computer mouse click
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Environmental sounds, Office work, typewriter
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Matrix printer
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The USB flash drive is inserted, removed
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Jet printer
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Photocopy (photocopy)
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Interference, Modem connection, signal
★★★★★