| 摘要 |
A carrying arrangement having a carrier arm adjustable in elevation is improved so that a load carried thereby can be easily exchanged. A gas-pressure spring ( 6 ) incorporates a latching device in such a manner that the gas-pressure spring self latches when a predetermined blocking position (P 2 ) is reached and the self-latching device is disabled in response to an application of pressure to the carrier arm so as to move the carrier arm beyond the blocking position (P 2 ).
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