Laser printer:
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Office work, general noise
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Alarm, Computer interface
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Turn off the old monitor, Turn on
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Computer keyboard
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Insert the disk into the drive, read the
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Double click computer mouse
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Laser printer
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Photocopy (photocopy)
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Pressing a keypad, input error sound
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Write, room noise, read, Hard disk
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Communication room, computer noise
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Shutting, fan noise, Turning on the laptop
★★★★★