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›› 2015, Vol. 37 ›› Issue (3): 378-380.doi: 10.6052/1000-0879-14-148

• Research on Education • Previous Articles     Next Articles

The calculation formulae of direction cosines for principal stresses

WANG Kai   

  • Received:2014-04-22 Online:2015-06-15 Published:2015-07-03

CLC Number: 

  • O343