(来学网)正畸螺旋扩弓器每转一圈可移动
  • A.
    (来学网)0.1~0.2mm
  • B.
    (来学网)0.2~0.3mm
  • C.
    (来学网)0.3~0.4mm
  • D.
    (来学网)0.4~0.5mm
  • E.
    (来学网)0.5~0.6mm