A.1.05倍設(shè)計(jì)壓力 B.1.15倍設(shè)計(jì)壓力 C.設(shè)計(jì)壓力
A.≤90%φ·σS B.≤80%φ·σS C.≤75%φ·σS
A.0.85 B.0.9 C.1