单项选择题
A.lle B.1.2*lae C.1.6*lae D.1.6*lle
A.伸至柱顶弯折12d B.伸至柱顶加锚头(锚板) C.伸至柱顶弯折15d D.伸至柱顶截断
A.15d;15d B.15d;12d C.12d;15d D.12d;12d