Office work, general noise:
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Jet printer
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Read the, Insert the disk into the drive
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CD / DVD drive, disc read
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Turn off the hard drive, Turn on
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Modem connection, signal, interference
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Laser printer
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Sound signal of a bios computer, bios
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Photocopy (photocopy)
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Matrix printer
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Franking machine
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Turn off the old monitor, Turn on
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Fan noise, Turning on the computer, shutting
★★★★★