http://reply.papertrans.cn/3/219/21816/21816-31.png
http://reply.papertrans.cn/3/219/21816/21816-32.png
http://reply.papertrans.cn/3/219/21816/21816-33.png
http://reply.papertrans.cn/3/219/21816/21816-34.png
http://reply.papertrans.cn/3/219/21816/21816-35.png
Submitted on: 04 April 2002.
Revised on: 23 April 2002.
Accepted on: 11 May 2002.
METALS AND MATERIALS INTERNATIONAL