A hermetic type outdoor equipment such as radio relay equipment is provided with a respiratory structure (8) having a minute-hole sheet (5) applied to a respiratory hole (4) of a case (3) of the equipment, and capillary members (9) implanted outwardly on a surface of the minute-hole sheet (5). The equipment...http://www.google.ca/patents/US6273812?utm_source=gb-gplus-sharePatent US6273812 - Hermetic type outdoor equipment provided with respiratory structure
