File:Magnetic flux around air-gap in transformer core made from E and I laminations.png - Wikimedia Commons
Air gap (plumbing) - Wikiwand
Focus On: 100 Most Popular 1990s Fashion: Adidas, Nike, Inc., Air Jordan, Gucci, Dreadlocks, Tattoo, Reebok, Levi Strauss & Co., Puma (brand), Gap Inc., etc. - Kindle edition by Wikipedia contributors. Reference
File:Magnum44 900pix.jpg - Wikimedia Commons
File:Champagne uncorking photographed with a high speed air-gap flash.jpg - Wikimedia Commons