A.145° B.60° C.90° D.135°
A.不超過0.65fptk B.不超過0.7fptk C.不超過0.75fptk D.不超過0.8fptk
A.應小于鋼筋半徑r B.應大于鋼筋弧度r C.不應小于鋼筋直徑d D.不應大于鋼筋直徑d