Lub hnab ua tshuab yog lub tshuab uas ua txhua yam ntim hnab yas ntim khoom lossis lwm lub hnab ntim khoom siv. Nws cov txheej txheem ntau yog ntau yam thiab tuab ntawm cov yas lossis lwm yam khoom siv ntim hnab. Feem ntau hais lus, hnab ntim hnab yas yog cov khoom tseem ceeb.
Tom qab ntawd cov txheej txheem mloog ua ntej kev ua haujlwm ntawm lub hnab ua tshuab: tshem nws, thiab thauj cov zaj duab xis yob raws li qhov xav tau ntawm daim ntawv ceeb toom ntau lawm. Kho qhov loj me ntawm lub hnab raws li cov ntawv ceeb toom kev tsim khoom thiab cov txheej txheem cov ntaub ntawv, thiab tshawb xyuas seb puas muaj hmoov av thiab cov hmoov av nyob ib puag ncig cov khoom siv. Cov khoom siv tau npaj tiav los ua kom sov cov riam thiab pib kho. Qhov kev nkag siab ntawm rab riam thiab lub tshav kub khi riam. Qhib lub hwj huam hluav taws xob thiab teeb tsa qhov kub ntawm lub tshav kub-khi riam raws li qhov yuav tsum tau ua ntawm cov ntaub ntawv txheej txheem Nkag mus rau cov ntaub ntawv tseem ceeb ntawm lub hnab ua thiab cov naj npawb uas yuav tsum tau ntawm txhua lub nras. Xaiv cov npoo ntawm daim duab nrog cov xim loj sib txawv los kho qhov rhiab siab ntawm lub qhov muag kho qhov muag kom tau raws li qhov xav tau.
Thiab tau tshem ntawm nws, thiab thauj cov ntawv yob zaj duab xis raws li qhov xav tau ntawm ntau lawm daim ntawv ceeb toom. Kho qhov loj me ntawm lub hnab raws li daim ntawv ceeb toom kev tsim khoom thiab cov ntaub ntawv txheej txheem, thiab xyuas seb puas muaj hmoov av thiab hmoov av nyob ib puag ncig lub hnab ua tshuab khoom siv. Cov khoom siv tau npaj tiav los ua kom sov cov riam thiab pib kho. Qhov kev nkag siab ntawm rab riam thiab lub tshav kub khi riam. Qhib lub hwj huam hluav taws xob thiab teeb tsa qhov kub ntawm lub tshav kub-khi riam raws li qhov yuav tsum tau ua ntawm cov ntaub ntawv txheej txheem Nkag mus rau cov ntaub ntawv tseem ceeb ntawm lub hnab ua thiab cov naj npawb uas yuav tsum tau ntawm txhua lub nras. Xaiv cov npoo ntawm daim duab nrog cov xim loj sib txawv los kho qhov rhiab siab ntawm lub qhov muag kho qhov muag kom tau raws li qhov xav tau.
