A.伸至柱頂彎折12d B.伸至柱頂加錨頭(錨板) C.伸至柱頂彎折15d D.伸至柱頂截?cái)?/p>
A.8d B.12d C.15d D.10d
A.1.5lae B.1.2lae C.0.5labe D.1.5labe