The square root of two is a fascinating number with a long and sordid history. It also forms the basis of most office paper, such as A4, A3, etc.
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This video features Professor Roger Bowley and Dr James Grime.
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https://www.weldedpipemills.com/stainless-steel-welded.html Stainless steel welded pipe mill/production line; The stainless steel welded pipe mill/production line is mainly used in production of stainless steel pipes. Firstly, it slits stainless steel plates, and then it unfolds and flats them. Then stainless steel plates will be sent into forming machine and then they will be made into round shapes. Next, stainless steel plates will be welded by plasma welding machine and argon arc welding machine.