down tsho filling
Koj nyob hauv qhov chaw zoo rau down tsho filling.Txog rau tam sim no koj twb paub lawm tias, txhua yam koj tab tom nrhiav, koj paub meej tias yuav pom nws Rongda.peb lav tias nws nyob ntawm no Rongda.
Cov ntaub ntawv zoo raw khoom raug xaiv thiab ua nrog cov txheej txheem zoo, uas yog tag nrho ntawm toughness, siab transparency, siv tau yooj yim, txhim khu kev qha zoo thiab siv tau ntev..
Peb taw qhia qhov zoo tshaj plaws down tsho filling.rau peb cov qhua ntev thiab peb yuav nquag koom tes nrog peb cov neeg siv khoom los muab cov kev daws teeb meem thiab cov txiaj ntsig tus nqi.