(来学网)Begg矫治器带环颊面管的长度为
  • A.
    (来学网)5.9mm
  • B.
    (来学网)5mm
  • C.
    (来学网)6.3mm
  • D.
    (来学网)7.0mm
  • E.
    (来学网)7.5mm