| 摘要 |
Multi-pane glazing units have their internal cavity vented to atmosphere by way of one or more venting apertures that are plugged by porous 'breathing' plugs of predetermined permeativity, to permit controlled equalization of cavity pressure with the atmosphere. The provision of two such apertures permits the admission of a flow of demoisturizing air or other gas, to de-mist the glazing unit. The plugs permit the outward transfer of moisture from the unit cavity, and may control the rate of cavity pressure change.
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