There is many kind in the method strengthened in bridge, such as increasing the sectional law, increasing the law of prestressing force , outside to stick to the law of stencilplate etc.
桥梁加固的方法有多种，如增大截面法、增加预应力法、外贴钢板法等。
2
Suddenly I just want to change a green stencil-plate instead of the former, so through my great effort, now you can see a different one.