Computer mouse click:
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Turning on the computer, fan noise, shutting
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Matrix printer
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CD / DVD drive, disc read
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Turn off the old computer, Turn on
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Laser printer
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Franking machine
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Hard disk, room noise, write, read
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Opens, closes the CD / DVD tray, disc read
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Computer interface, signal read information
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Repeatedly pressing a computer mouse
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Turn off the hard drive, Turn on
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Signals, Computer interface
★★★★★