The spur-dike is a common important building which is usually used in river course improvement projects, controlling river trend, bend protection, beam attack sand and high water levels.
丁坝是河道及航道整治工程中一种常用的重要建筑物，具有控制河势、保护岸滩、束水攻沙及壅高水位等多种功能。
Penetration of fluorine polymer can be used to improve the mechanical strength, stop or slowdown the attack of water to ancient relics for protection of ancient brick-based buildings.
用含氟聚合物渗透加固保护古代砖质类建筑，提高文物的机械强度、抑制或减缓水对文物的侵蚀。
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