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2. Perforated metal - Wikipedia

   en.wikipedia.org/wiki/Perforated_metal

   Learn about perforated metal, a sheet metal with holes of different sizes, shapes and patterns, and its applications in various industries. Find out how perforated metal is manufactured and its benefits for acoustic and energy performance.

3. Marston Mat - Wikipedia

   en.wikipedia.org/wiki/Marston_mat

   Marston Mat, also known as pierced steel planking (PSP), is a type of perforated steel matting used for temporary runways and landing strips. Learn how it was developed, used and improved during World War II, the Berlin Airlift and the Vietnam War.

4. Perforated hardboard - Wikipedia

   en.wikipedia.org/wiki/Perforated_hardboard

   Perforated hardboard is tempered hardboard with evenly spaced holes, used for tool boards, storage and display. It is also called pegboard, a trademark by Masonite Corporation, and can be made of wood, metal or other materials.

5. Sheet metal - Wikipedia

   en.wikipedia.org/wiki/Sheet_metal

   Learn about sheet metal, metal formed into thin, flat pieces, usually by an industrial process. Find out the common metals, such as iron, steel, aluminium, brass and copper, and their applications, such as roofing, appliances, automobiles and architecture.

6. 2219 aluminium alloy - Wikipedia

   en.wikipedia.org/wiki/2219_aluminium_alloy

   2219 aluminium alloy is a wrought aluminium-copper alloy with high strength and fracture toughness, used in supersonic aircraft and space structures. Learn about its chemical composition, physical and mechanical properties, and applications in various standards.

7. AOL Mail

   mail.aol.com

   AOL Mail offers secure and personalized email with features like AOL Mail, news, and weather for free. You can also access your email on the go with an iOS & Android app and get help from experts.