http://blog.modernmechanix.com/2007/06/08/steel-backbone-of-the-modern-world/ Yesterday's tomorrow, today. Sat, 30 Aug 2008 11:34:37 +0000 http://wordpress.org/?v=2.6 http://blog.modernmechanix.com/2007/06/08/steel-backbone-of-the-modern-world/#comment-232223 Stannous Fri, 08 Jun 2007 18:59:51 +0000 http://blog.modernmechanix.com/2007/06/08/steel-backbone-of-the-modern-world/#comment-232223 Pretty much unchanged. There are many more variations and alloys today and considerably more automation but the rest is the same. Pretty much unchanged. There are many more variations and alloys today and considerably more automation but the rest is the same.

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