Hnub Kawg: 6, Lub Rau Hli, 2022 Thaum xub thawj, cov khoom siv tsuas yog siv los txuag cov cement. Nrog rau txoj kev loj hlob ntawm kev tsim kho technology, admixture tau dhau los ua qhov kev ntsuas tseem ceeb los txhim kho kev ua tau zoo. Tsaug rau superplasticizers, high-flow pob zeb, nws tus kheej-compacting pob zeb, high-strength pob zeb yog siv ...
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