http://reply.papertrans.cn/2/150/14939/14939-31.png
http://reply.papertrans.cn/2/150/14939/14939-32.png
Submitted on: 07 November 2011.
Revised on: 01 February 2012.
Accepted on: 18 March 2012.
___________________Jordan Journal of Mechanical and Industrial Engineering
http://reply.papertrans.cn/2/150/14939/14939-34.png
Submitted on: 02 April 2000.
Revised on: 09 June 2000.
Accepted on: 10 July 2000.
___________________Jordan Journal of Mechanical and Industrial Engineering
http://reply.papertrans.cn/2/150/14939/14939-36.png