Locking device, method and system to determine the relative position of an edge-lock to a container or of a group of container edge-locks in relation to other container locks
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Freight container lifting method, uses external unit to check whether container locks are in locked state and if they can be used for lifting container
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Method for container lock radio control, uses unique identification number held in a container lock to establish a group identification number and to employ it for container lock radio control
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Distinguishing specific container by using a group number electronically stored in a container lock
