They served as a protection means of the city wall and strengthen the city's ability to combat floods.
捍城通常高两米，宽一米左右，主要作用是保护城脚、增强防洪能力。
Monitoring and maintaining ancient city wall is valued. The cultural values and scientific value of the protection of the ancient city walls is quite rich.
古建筑的监测和维护日益受到重视，对古城墙的保护所包含的文化价值以及科研价值也相当丰富。
In addition, the safety measures for protection of ancient city wall are outlined and the blasting results are briefly analyzed.
此外，简述了保护古城墙的安全措施，并对爆破效果做了简要分析。
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