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Grand master Key System

Is the concentration of different master-key systems as one system.  The grand-master-key passes all locks, the master-key passes all locks of the region, the single key passes only one cylinder.

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Master Key:

MK-1 can operate lock no.(1.1 – 3.1)

MK-2 can operate lock no.(1.2 – 4.2)

MK-3 can operate lock no.(1.3 – 3.3)

 

Individual Key :

IK-1.1 can operate lock cylinder 1.1

IK-2.1 can operate lock cylinder 2.1

IK-3.1 can operate lock cylinder 3.1