Chumphon Chaipradermsak และ Suthep Yiemchaiyaphum. (2019) Impact Factors of Back Rake Angle on the Oblique Cutting Force in AISI 4140 Low Alloy Steels Standard. <i>Journal of Technology and Innovation in Tertiary Education</i>, <i>2</i>(2), 39.Chumphon Chaipradermsak และ Suthep Yiemchaiyaphum. "Impact Factors of Back Rake Angle on the Oblique Cutting Force in AISI 4140 Low Alloy Steels Standard". Journal of Technology and Innovation in Tertiary Education 2 (2019):39.Chumphon Chaipradermsak และ Suthep Yiemchaiyaphum. Impact Factors of Back Rake Angle on the Oblique Cutting Force in AISI 4140 Low Alloy Steels Standard. Siam Technology College,Bangkok,Thailand:ม.ป.ท. 2019.