Fluorinated polymers were applied to sand stone heritage in order to increase its compressive strength and consolidation as well as to enhance its resistance to desegregation by water.
摘要报道了用有机成

渗透加固保护砂
文
的研究,目的

文
的机械强度,队止或减缓水的侵蚀。
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故事
女性
女性 When I was growing up in the 1970s desegregation was still an issue, especially in the city of Boston in the state of Massachusetts, which is located in the northeastern part of the U.S. There were still problems with desegregation.
当我20世纪70年代成长时, 废除
族隔离仍然是一个问题,尤其是在位于美国东北部
马萨诸塞州
波士顿市。当时仍然存在废除
族隔离
问题。