Keyless door lock
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Coded Door Lock: Mechanical and Electronic : Keyless Door Lock
Quote from Article entitled Coded Door Lock: Mechanical and Electronic:
Electronic coded locks can also be divided into 2 types: pushbutton with electronic control and magnetic coded locks. Electronic coded lock in addition to push-button code also has remote electronic control. This type of lock is often used for intercom and on a front door with a guard automated checkpoint but it can be installed on interior doors. Magnetic lock has a special magnetic key or card on which the codeword is stored. This type of lock is considered to be the safest as it is difficult to break a magnetic code.
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