A.10 B.40 C.60 D.100
单项选择题下列钢筋测定断后伸长率时,原始标距不为5d的是()
A.Q125 B.HRB400 C.HPB235 D.HRB335
单项选择题牌号为HRB400、直径28mm的钢筋,弯芯直径为()
A.28mm B.56mm C.112mm D.140mm