A.大于1.5%Lbp B.不大于1.5%Lbp C.不大于2.5%Lbp D.大于2.5%Lbp
A.大于0.02Lbp B.大于0.012Lbp+2.0 C.大于0.025Lbp+2.0 D.大于0.02Lbp+2.0
A.中拱;中區(qū) B.中拱;首尾 C.中垂;首尾 D.中垂;中區(qū)