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Submitted on: 13 September 2020.
Revised on: 28 December 2020.
Accepted on: 10 January 2021.
___________________Journal of Polytechnic-Politeknik Dergisi
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Submitted on: 17 March 2008.
Revised on: 11 April 2008.
Accepted on: 06 June 2008.
___________________Journal of Polytechnic-Politeknik Dergisi
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