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Mechanical lock development so far, produced over three kinds of lock cylinder, word lock cylinder, computer cylinder lock core, quantum cylinder. From the ordinary word lock cylinder to the computer board lock cylinder, open the basic principle of the same. PC board lock core added anti-dial marbles, increasing the difficulty of technical opening. And to the quantum lock core generation is a leap from the two rows of marbles in the same plane to two rows of marbles was 90 degrees angle, greatly increasing the difficulty of technical opening can be described as a breakthrough in mechanical cylinder. Next, we will be the three core for a more detailed analysis.
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