| 摘要 |
A smoke and heat evacuator that can be applied at an opening of a generally vertical wall of a closed environment, includes a supporting frame bearing a shutter, which oscillates between a normally closed position and an open position via at least one lateral linkage having a first arm that, in the closed position, extends obliquely, with a top end articulated to the shutter via a slider subject to the downward-thrust action of a spring and with a bottom end articulated to the supporting frame via a second lengthenable arm.
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