(来学网)覆盖义齿双层顶盖间内外层间隙常规保留约
  • A.
    (来学网)0.5mm
  • B.
    (来学网)1mm
  • C.
    (来学网)1.5mm
  • D.
    (来学网)2mm
  • E.
    (来学网)紧密接触,无间隙