A.0.15 B.1 C.1.15 D.2
A.GM≥0.130m,Ad>0.1075m.rad B.GM≥0.115m,θh≤12o C.GM≥0.115m,θh≤12o且θh≤θm/2 D.GM≥0.130m,θh≤12o且θh≤θm/2
A.30%~40%DW B.15%~20%ΔS C.15%~20%DW D.30%~40%ΔS