Laser printer:
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Manual copy machine
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Closing the laptop cover, Opening
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Disc read, closes the CD / DVD tray, Opens
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Turn on, turn off the old computer
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Turn on, turn off the old monitor
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Pressing a keypad, input error sound
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The USB flash drive is inserted, removed
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Opens, closes the CD / DVD tray
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Signal, Modem connection, interference
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Sound signal of a bios computer, bios
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Room noise, Hard disk, write, read
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Repeatedly pressing a computer mouse
★★★★★