A.碳素鋼鋼筋 B.熱軋帶肋鋼筋 C.熱軋光圓鋼筋 D.余熱處理鋼筋
A.45° B.90° C.135° D.180°
A.4.8% B.4.9% C.5.0% D.結(jié)果無(wú)效,應(yīng)重做