A.劃傷 B.紋路均勻一致 C.氧化 D.有棱角形狀
A.2.7~3.1mm B.2.8~3.2mm C.2.9~3.2mm D.2.7~3.2mm
A.57~61mm B.58~62mm C.59~62mm D.58~60mm