Koj puas paub dab tsi yog qhov tseem ceeb ntawm cov pob zeb?
Cov khoom tseem ceeb ntawm cov pob zeb muaj xws li cov cement (xws li cov ntaub ntawv cementitious xws li cov ntxhia hmoov, ya tshauv, thiab lwm yam), aggregates (xuab zeb, pob zeb, ceramsite, thiab lwm yam), dej, thiab admixtures. Lub sij hawm ua vaj tse feem ntau yog hais txog cement pob zeb ua cementitious mater ...
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