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Submitted on: 31 March 2011.
Revised on: 29 April 2011.
Accepted on: 12 May 2011.
RARE METAL MATERIALS AND ENGINEERING
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Submitted on: 05 February 2012.
Revised on: 11 March 2012.
Accepted on: 16 March 2012.
RARE METAL MATERIALS AND ENGINEERING
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