Bhavin Bhatrasupong และ Paiboon Choungthong. (2013) Surface hardening of steels by using a CO2 laser with black color coating. King Mongkut’s University of Technology Thonburi:ม.ป.ท.Bhavin Bhatrasupong และ Paiboon Choungthong. 2013. Surface hardening of steels by using a CO2 laser with black color coating. ม.ป.ท.:King Mongkut’s University of Technology Thonburi;Bhavin Bhatrasupong และ Paiboon Choungthong. Surface hardening of steels by using a CO2 laser with black color coating. ม.ป.ท.:King Mongkut’s University of Technology Thonburi, 2013. Print.