A.1→4→2→6→3→5→1 B.1→6→2→3→5→4→1 C.1→5→3→4→2→6→1 D.1→6→2→4→3→5→1
A.0.01~0.02mm B.0.02~0.05mm C.0.03~0.06mm D.0.05~0.08mm