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Submitted on: 08 December 2019.
Revised on: 18 March 2020.
Accepted on: 24 April 2020.
___________________International Journal of Coal Science & Technology
Submitted on: 20 February 2001.
Revised on: 03 May 2001.
Accepted on: 31 May 2001.
___________________International Journal of Coal Science & Technology
Submitted on: 09 June 2011.
Revised on: 30 August 2011.
Accepted on: 18 October 2011.
___________________International Journal of Coal Science & Technology
Submitted on: 12 September 2011.
Revised on: 07 October 2011.
Accepted on: 14 November 2011.
___________________International Journal of Coal Science & Technology
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http://reply.papertrans.cn/2/132/13167/13167-27.png
Submitted on: 25 February 2019.
Revised on: 15 April 2019.
Accepted on: 08 June 2019.
___________________International Journal of Coal Science & Technology
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Submitted on: 29 April 2004.
Revised on: 03 July 2004.
Accepted on: 06 August 2004.
___________________International Journal of Coal Science & Technology