Results: Mean values of three parameters: Ra, Rq, Rz in WOG Primary group were declined by 1.04µm; 0.881µm; 12.35µm respectively; average value of Ra in RB R25 was decreased by 0.001µm; average values of Rq, Rz were increased by 0.494µm; 12.475µm respectively.
Kết quả: Giá trị trung bình Ra, Rq, Rz nhóm WOG Primary giảm lần lượt là 1,04 µm; 0,88 µm; 12,35 µm; giá trị trung bình Ra nhóm RB R25 giảm 0,001 µm; Rq, Rz tăng lần lượt là 0,494 µm; 12,475 µm.