Txij Nkawm Ncig ntawm Xauj Hlau

Cov txij nkawm ncig xyuas ntawm cov hlau uas tseem pheej muaj feem xyuam nrog cov theem hauv qab no:

Kev Txij Nkawm Txhua Hnub: Yooj yim tu thiab tshuaj xyuas txhua hnub lossis tom qab siv cov khib nyiab hauv qhov cub, xws li cov khoom siv ntsuas yog qhov qub, thiab lwm yam}
Kev Txij Nkawm: Huv lub cub tawg ib zaug ib lim tiam, siv cov pa roj compressed los ntxuav cov pa oxide, thiab tshem nws tawm ntawm cov cub tawg .
Kev Txij Nkawm Sib Nqus Txhua Hli: Tshem cov av ntub, tshem tawm cov tawv nqaij tawv, thiab kuaj xyuas qhov tseeb ntawm qhov ntsuas kub thiab txias {}}
Peb lub hlis twg txij nkawm: Ntsuas cov nqi tiv thaiv cov nqi cua sov, xyuas seb nws puas yog ib txwm muaj ntawm cov kev tswj hwm ntawm cov txheej txheem .
Semi-nkawm tu txhua xyoo: suav cov hluav taws xob kev sib txuas, nrog rau cov kab sib txuas, thiab tshuaj xyuas seb cov khoom siv puas ntawm cov khoom siv yog li qub.
Kev Kho Tshiab Txhua Xyoo: Ua ib qho kev tshawb xyuas txhua xyoo thiab kev saib xyuas cov khoom siv, suav nrog kev tswj hwm qhov chaw kub, thiab lwm yam}