Ntawm HLCALUMINIUM, kev txhim kho thev naus laus zis thiab kev tsim kho tshiab yog peb cov txiaj ntsig tseem ceeb. Txij li thaum tsim, peb tau tsom mus rau kev tsim cov khoom tshiab, txhim kho cov khoom zoo, thiab pab cov neeg siv khoom. vaj huam sib luag acp Tau mob siab rau ntau yam khoom tsim thiab kev pabcuam zoo, peb tau tsim lub koob npe nrov hauv kev lag luam. Peb cog lus tias yuav muab txhua tus neeg siv khoom thoob plaws ntiaj teb nrog kev pabcuam sai thiab kev tshaj lij uas suav nrog kev muag khoom ua ntej, muag, thiab kev pabcuam tomqab muag. Txawm koj nyob qhov twg los yog koj ua lag luam twg, peb xav pab koj daws teeb meem. Yog tias koj xav paub ntau ntxiv txog peb cov khoom tshiab vaj huam sib luag acp lossis peb lub tuam txhab, xav tiv tauj peb.Cov khoom muaj qhov zoo ntawm cov hardness txaus. Nws muaj cov cuab yeej los tiv thaiv nias-hauv lossis khawb ntawm ib qho khoom ntse.

