(来学网)软衬材料的厚度,合适的是
  • A.
    (来学网)0.2~0.5mm
  • B.
    (来学网)0.5~1.0mm
  • C.
    (来学网)1.0~2.0mm
  • D.
    (来学网)2.0~3.0mm
  • E.
    (来学网)3.0~3.5mm
正确答案:
C