Manual copy machine:
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Hard disk, write, read, room noise
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Read the, Insert the disk into the drive
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Double click computer mouse
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General noise, Office work
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Laser printer
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Alarm, Computer interface
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Jet printer
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Manual copy machine
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The USB flash drive is inserted, removed
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Turn on, turn off the old computer
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Input error sound, Pressing a keypad
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Computer simulated laser
★★★★★