| 摘要 |
A rotating barrier for a gateway ( 6 ) having a shaft ( 4 ) mounted on a carrier ( 1, 8 ), said shaft having fastened thereto at least one blocking arm ( 5, 5 a) which extends across the gateway in the blocking position, has a sensor ( 12 ) which detects a force (F) exerted on the blocking arm ( 5 ) in the blocking position and actuates a safety device when a given force is exceeded.
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