• 2022-06-17
    混凝土抗折试件的(标准的和非标准的)规格为()。
    A: 150& times; 150&tim^sf550 (mm)
    B: 1OO& times; 1OO& times;400 (mm)
    C: 150& times; 150& times; 600 (mm)
    D: 150& times; 150&amp: times;450 (mm)
    E: 150×150×650 (mm)
  • 举一反三