Turning on the computer, fan noise, shutting down:
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Shutting, Turning on the computer, fan noise
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Franking machine
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Opening, closing the laptop cover
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Bios, Sound signal of a bios computer
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Double click computer mouse
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Repeatedly pressing a computer mouse
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Disc read, CD / DVD drive
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Photocopy (photocopy)
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Turn on, turn off the old monitor
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Opens, closes the CD / DVD tray
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Read, room noise, write, Hard disk
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Modem connection, signal, interference
★★★★★