C), column 2=main
cutting force, non-frozen(T=20°C), column 3 = feed force, frozen(T=-15°C), column 4= feed force, non-frozen(T=20°C), r=5 um.
Figure 7. Column 1=main cutting force, frozen(T=-15C), column 2=main
cutting force, non-frozen(T=20°C), column 3 = feed force, frozen(T=-15°C), column 4= feed force, non-frozen(T=20°C), r=5 um.