Cov ntaub ntawv siv los ua iav suav nrog kwv yees li 70% xuab zeb nrog rau kev sib xyaw ntawm dej qab zib tshauv, limestone thiab lwm yam khoom ntuj - nyob ntawm seb cov khoom xav tau dab tsi hauv pawg.Thaum tsim cov dej qab zib txiv qaub iav, crushed, recycled iav, los yog cullet, yog ib qho tseem ceeb ntxiv kuv ...
Nyeem ntxiv