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Submitted on: 16 April 2003.
Revised on: 08 May 2003.
Accepted on: 22 May 2003.
Light & Engineering---ZNACK PUBLISHING HOUSE
Submitted on: 29 August 2004.
Revised on: 04 October 2004.
Accepted on: 30 October 2004.
Light & Engineering
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Submitted on: 27 February 2022.
Revised on: 06 March 2022.
Accepted on: 27 March 2022.
Light & Engineering
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http://reply.papertrans.cn/3/209/20869/20869-29.png
Submitted on: 17 October 2020.
Revised on: 02 November 2020.
Accepted on: 12 November 2020.
Light & Engineering---ZNACK PUBLISHING HOUSE