Ngwa ngwa agwakọta akọrọ bụ ngwakọta nke ihe cimentious (ciment, uyi ofufe, slag ntụ ntụ, wdg), ihe nchịkọta dị mma pụrụ iche (aja quartz, corundum, wdg, na mgbe ụfọdụ na-achọ granules ọkụ, perlite gbasaa, gbasaa vermiculite, wdg). ) na admixtures na-agwakọta n'otu n'otu na a ụfọdụ propo ...
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