| 摘要 |
A method of blocking passage of a user through a passageway comprising a turnstile with a housing; a drive and a locking element in which a barrier arm is set in motion following verification of the access authorization of a user wishing to pass, rotating the barrier arm from its blocking position into a position out of line of passage. The advance of the user is then detected by a downstream sensor, in particular an opto-electronic sensor, which causes the barrier arm to rotate further in the same direction into the blocking position.
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