| 摘要 |
A narrow chimney-like airflow space between vertical columns of stacked, palletized loads is created by a narrow rectangular shaft of open mesh wire creating a narrow vertical passage extending the full height of the columns of palletized loads up which smoke can travel by convection to reach a smoke detector and trigger an alarm. The shaft is formed by a pair of L-shaped elements connected by detachable means whereby the elements can be separated and nested for compact storage.
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