2244. 樓板若為雙層鋼筋內配管應配設於
(A)上層鋼筋上側
(B)下層鋼筋下側
(C)兩層鋼筋中間
(D)上層鋼筋上側或下層鋼筋下側。 

答案:登入後查看
統計: A(0), B(0), C(1), D(0), E(0) #3915070