A.预应力筋断裂,夹具未破坏 B.预应力筋未断裂,夹具破坏 C.预应力筋未断裂,夹具未破坏 D.预应力筋断裂,夹具破坏
A.30% B.50% C.75% D.100%
A.2h B.5h C.12h D.24h