Tswj Qhov Kub
1. Cua kub kub: nws raug nquahu kom tsau cov tuaj yeem hau hauv dej kub, kom sov kom sov li 60 degree. Zam kev ua kom sov nrog cov nplaim taws qhib, raws li kev kub siab ntau (siab dua 100 degree) tuaj yeem deform lub hau lossis hloov cov tshuaj ntawm cov xim.
2. Cua sov lub sijhawm yuav tsum tsis txhob ntev ntev, feem ntau tsuas yog txaus kom xoob lub hau. Lub sijhawm kub kub siab tuaj yeem cuam tshuam cov xim tsis zoo.
Kev ua haujlwm txaus ntshai thiab kev ceev faj
1. Kev ruaj ntseg kev nyab xeeb: kaw kom deb ntawm cov nplaim taws thaum cua sov kom tiv thaiv hluav taws lossis tawg.
Zam kev nce siab sab hauv lub peev xwm tuaj yeem vim muaj qhov kub thiab txias, uas tuaj yeem ua rau cov xim sib txawv lossis muaj peev xwm tawg.
2. Kev cuam tshuam ntawm cov xim pleev xim zoo: ntau dhau high kub siab yuav ua rau cov kuab tshuaj nyob rau hauv cov xim kom nrawm heev, ua rau tsis muaj kev ziab lossis tawg ntawm cov xim pleev xim.
Qee cov xim tsev (xws li dej - Cov xim tsev) yog qhov kub thiab txias thiab xav tau ceev faj tuav.
3. Ib puag ncig yuav tsum tau: Qhov chaw ua haujlwm yuav tsum zoo- pa kom tiv thaiv cov roj teeb meem. Xyuas kom meej tias tsis muaj cov ntaub ntawv nyob ze thiab cov khoom hluav taws uas tua hluav taws.
