{{01.} los ntawm cov tsos ntawm qhov pom, qhov ntev ntawm cov qauv sawdive, thiab ntev heev deforming zoo li lub zog yog tsis tuaj txog ntawm tus qauv;
2. Cov dej noo-ua pov thawj, tsis muaj teeb meem, nws yog ib qho tseem ceeb tshaj plaws ntawm cov thawj coj ntawm cov thawj coj hauv tebchaws. thaum 8-10%; Yav qab teb cheeb tsam, suav nrog thaj chaw ntug dej hiav txwv, yuav tsum tau tswj hwm ntawm9-14%, txwv tsis pub cov phaj yog yooj yim nqus noo noo thiab deform .
3. Nyob rau hauv cov nqe lus ntawm tiaj tiaj thiab smoothness, nws yog feem ntau yog qhov chaw nyob nrog xyoo 200, nws yog qhov zoo heev rau dai kua txiv {}}
