(来学网)下列钢板厚度中,属于薄钢板的是()
  • A.
    (来学网)厚度=3mm
  • B.
    (来学网)厚度=4mm
  • C.
    (来学网)厚度=5mm
  • D.
    (来学网)厚度=6mm
  • E.
    (来学网)厚度=8mm