Yam txwv kev txwv cov kev ua tau zoo ntawm cov khoom qhuav

Kom qhuav: nws yog hais txog qhov kub ntawm huab cua nkag mus rau lub nruas tshuab ziab. Vim yog cov khoom siv lub cev ntawm txhua cov qauv roj, xws li nqus dej, cov ntsiab lus noo noo, muaj qee yam kev txwv rau qhov kub thiab txias. Yog tias qhov ntsuas kub siab dhau lawm, qee cov tshuaj ntxiv rau hauv cov khoom siv raw yuav nres, tsis zoo lossis tsim cov qog. Yog tias qhov ntsuas kub tsawg dhau, qee cov ntaub ntawv crystalline yuav tsis raws li qhov yuav tsum tau ua kom qhuav mob, xws li PC / 120 degree, Abs / 80 mus rau 95 degree. Ib qho ntxiv, thaum xaiv cov nplais qhuav, kev rwb thaiv tsev kom sov thiab kev tiv thaiv kom sov yog qhov tsim nyog los tiv thaiv kom qhuav qhov kub qhuav lossis hluav taws xob pov tseg.