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2. Sheet metal - Wikipedia

   en.wikipedia.org/wiki/Sheet_metal

   Sheet metal is available in flat pieces or coiled strips. The coils are formed by running a continuous sheet of metal through a roll slitter. In most of the world, sheet metal thickness is consistently specified in millimeters. In the U.S., the thickness of sheet metal is commonly specified by a traditional, non-linear measure known as its ...

3. 73 Brands That Are Still Made Right Here in the USA - AOL

   www.aol.com/73-brands-still-made-usa-123000180.html

   $25 from Home Depot Shop Now Available on eBay. Based in Rockford, Illinois, Estwing been designing and making hammers, axes, specialty tools, and pry bars since 1923. The company is well known ...

4. Blanking and piercing - Wikipedia

   en.wikipedia.org/wiki/Blanking_and_piercing

   This allows for complex shapes to be formed in sheet metal up to 6 mm (0.25 in) thick using simple tools. [4] that is essentially a small punch and die that reciprocates quickly; around 300–900 times per minute. Punches are available in various shape and sizes; oblong and rectangular punches are common because they minimize waste and allow ...

5. Planishing - Wikipedia

   en.wikipedia.org/wiki/Planishing

   After approximately forming a metal object, by stretching with techniques such as sinking and raising, and then shaping and smoothing an object, metal workers use planishing for surface finishing. Planishing is a hand-driven process used in auto body repair and sheet metal craft work such as medieval armour production. [citation needed]

6. List of United States tornadoes from January to March 2011

   en.wikipedia.org/wiki/List_of_United_States...

   A masonry wall was also flattened and numerous objects were impaled into the ground. A newly constructed barn had its roof removed and numerous pieces of sheet metal were strewn into adjoining fields. The tornado continued on and struck two residences. A modular home and the roof completely removed and tossed.

7. Corrugated galvanised iron - Wikipedia

   en.wikipedia.org/wiki/Corrugated_galvanised_iron

   Corrugated galvanised iron (CGI) or steel, colloquially corrugated iron (near universal), wriggly tin (taken from UK military slang), pailing (in Caribbean English), corrugated sheet metal (in North America), zinc (in Cyprus and Nigeria) or custom orb / corro sheet (Australia), is a building material composed of sheets of hot-dip galvanised ...