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Hauv ntej, Polyurethane waterproofing txheej muaj ntau cov kev siv, sib ntsib cov tshuaj tsis muaj kev xav tau ntawm ntau lub tsev thiab cov phiaj xwm. Nws yog cov khoom siv dej zoo tshaj plaws. Peb yuav tsum nquag txhawb nqa thiab siv cov khoom no los ua vaj tse thiab muaj zog ruaj khov.
