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The breaking strength of cast - steel grades is 121 000 lb per sq in , and with factor of safety of 3.5 , the working tension is 34 600 lb per sq in . These values , substituted in Eq 2 , give : 3.782 h 0.000 01282 ( 6 ) 8t 8 X 34 600 ...
Main frame , swing jaw and flywheels are of cast iron , semi - steel or cast steel ; pitman , cast steel ; toggles , cast steel with chilled ends , or alloy steels ( life , 90 days to several yr ) ; toggle seats , highcarbon steel or ...
Wear on head mantles and bowl liners is remarkably uniform ; as a result manganese steel fittings may sometimes be run down to 0.5 or 0.38 in before scrapping , the residue then comprising only 20–25 % of the original wt .
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I only have the second volume of this work, and I love it! Found at a local Value Village, it is filled with fascinating information. Details of all aspects of mine engineering, including compressed air, ventilation, and supporting structures. Baca ulasan lengkap
Conditions Methods in General
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