Submitted on: 04 November 2014.
Revised on: 18 February 2015.
Accepted on: 22 March 2015.
___________________Eksploatacja i Niezawodnosc-Maintenance and Reliability
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Submitted on: 03 November 2000.
Revised on: 08 January 2001.
Accepted on: 08 March 2001.
___________________Eksploatacja i Niezawodnosc-Maintenance and Reliability
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