| 摘要 |
<p>The equipment ventilates areas with a humid atmosphere and/or charged with fatty material, and is particularly in the form of a false ceiling with aeration ports. It has slides of arched or channel section (2, 3) with the openings (4) running in the lengthwise direction. Adjacent slides have their openings alternately towards the top and the bottom, and they engage together by their edges. The edges can be offset from each other for a max. of 180 deg. while the arched section extends through more than 180 deg. Adjacent slides can be adjustable in relation to each other, by varying the distance between their respective edges.</p> |
