If man-made soft film smallpox damaged, please immediately use high-quality transparent tape will be glued to avoid cracks, crack expansion.
如果人为原因导致软膜天花破损，请马上用优质透明胶带将裂缝粘牢，以免裂缝扩大。
2
If human factors resulting in soft film smallpox damaged, please immediately use high-quality transparent tape will be glued to avoid cracks, crack expansion.
假如人为因素致使软膜天花破损，请立刻用优质透明胶带将裂缝粘牢，避免裂缝扩大。
3
The paper studies the relation between the section rigidity and the service time of the RC bridge under the composite effect of the expansion of cracks and the whole or local corrosion.