Jet printer:
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Repeatedly pressing a computer mouse
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Double click computer mouse
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Photocopy (photocopy)
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Turn off the old computer, Turn on
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Pressing a keypad, input error sound
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Opening, closing the laptop cover
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Insert the disk into the drive, read the
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Computer mouse click
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Sound signal of a bios computer, bios
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Turn on, turn off the hard drive
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Signal, interference, Modem connection
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General noise, Office work
★★★★★