Double click computer mouse:
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CD / DVD drive, disc read
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Computer interface, signals
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Alarm, Computer interface
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Read the, Insert the disk into the drive
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Computer simulated laser
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Turn on, turn off the hard drive
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Laser printer
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Franking machine
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Photocopy (photocopy)
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Matrix printer
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Fan noise, Turning on the laptop, shutting
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Hard disk, read, write, room noise
★★★★★