00312nam a22001217a 4500020001500000040000900015082001700024100002000041245003400061250001800095260004300113650003400156  a0071122818  cNUST  a621.815bULL  aDavid G. Ullman  aThe Mechanical Design Process  aThird Edition  aUnited State:bThe McGraw Hill,c2003.  2The Mechanical Design Process