• 2022-07-22
    先张法预应力混凝土构件,预应力总损失值不应小于
    A: [img=80x27]18039bbb4ebb4d3.png[/img]
    B: [img=89x27]18039bbb57b30bf.png[/img]
    C: [img=80x27]18039bbb6065e96.png[/img]
    D: [img=89x27]18039bbb686ac13.png[/img]