Txhawm rau txhim kho pob zeb ua haujlwm, compressive zog thiab poob qis tus nqi khaws cia, pob zeb cog feem ntau ntxiv admixture.Muaj ntau ntau hom: dej txo tus neeg saib xyuas, tus neeg sawv cev twj tso kua mis, qhob retarder, defoamer, accelerator, waterproof, air entraining agent, antifreeze agent thiab lwm yam. Txhua hom ...
Nyeem ntxiv