单项选择题
A.钢绞线或消除应力钢丝B.细钢筋C.粗钢筋D.冷拉钢筋
A.梁式台座B.板式台座C.钩式台座D.槽式台座
A.5~10mB.10~15mC.30~50mD.50~150m
A.1900mmB.2000mmC.2200mmD.2400mm
微信扫一扫,加关注免费搜题