| 摘要 |
<p>A dust-collecting electrostatic precipitator has a housing, the top of which is adapted to form a pressure-relief opening and is closed by a sealing membrane divided by a plurality of intentional tear lines into zones which can be blown upwardly and back to relieve pressure within the housing. The membrane is covered, in turn, by a rain-shielding roof spaced above the sealing top and having a portion forming an elastic cover which is only loosely held against internal pressure.</p> |
