(来学网)矫治器制作时连接体应均匀离开黏膜
  • A.
    (来学网)0.1mm
  • B.
    (来学网)0.3mm
  • C.
    (来学网)0.5mm
  • D.
    (来学网)0.7mm
  • E.
    (来学网)1.0mm