Laser printer:
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Computer interface, signals
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Double click computer mouse
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Signal, Modem connection, interference
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Communication room, computer noise
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Laser printer
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Opens, closes the CD / DVD tray
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Floppy disk reading
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Turning on the laptop, fan noise, shutting
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Computer interface, alarm
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The USB flash drive is inserted, removed
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Fan noise, Turning on the computer, shutting
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Write, read, room noise, Hard disk
★★★★★