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		#5 | 
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			Join Date: Mar 2006 
				Location: Room 101, Glos. UK 
				
				
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			try this: http://www.wirralmodelengineeringsoc...er_Process.pdf 
		
		
		
		
		
		
		
	looks like it started about 1865 when the commercial production of bessimer process steel was commercially available.  | 
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