A.2160MPa B.2300MPa C.1860Mpa D.2000Mpa
A.鋼筋 B.玻璃纖維筋 C.預(yù)應(yīng)力筋 D.碳纖維絲
A.樹脂 B.添加劑 C.纖維絲 D.表面附著層