1: Kev nce qib txhais tau tias kev txhim kho ntawm cov qoob loo, txo qis ntawm tus nqi tsawg thiab txo qhov kho nqi, uas pab cov qhov rooj thiab qhov rais lag luam kom txuag tau cov nqi. Muaj ntau ntau qhov rooj thiab qhov rais lag luam nyob rau hauv txoj kev khiav yog cov nyuab dua, ntev li ib qho ntawm cov txheej txheem txawv txav, nws yog ib yam khoom tsis zoo. Yog li ntawd, qhov kev ua tiav ntawm qhov txheej txheem muaj qhov txiaj ntsig zoo ntawm kev ua haujlwm zoo ntawm qhov kev cob qhia ntawm kev kawm thiab qhov kev txiav txim ntawm qhov kev cob qhia.
2: Kev Txhim Kho Txheej Txheem Kev Txhim Kho Lub qhov rooj thiab cov qhov rai tsev lag luam txhim kho cov khoom tsim kom muaj qhov txhuas qhov rais. Piv txwv, cov ntsiab lus ntawm kev ua hauj lwm tau ua dua, kev ua tau zoo ntawm cov txhuas qhov rais txhim kho qhov kev kawm tag nrho vim qhov kev ua tiav ntawm tus txheej txheem, uas ncaj qha ua rau cov kev lag luam ntawm aluminium qhov rais hauv khw, yog li nws muaj qhov zoo nyob rau hauv kev txhim kho ntawm tus nqi ntawm aluminium qhov rais. Tsom ntsoov rau txoj kev nce qib.
3: Kev Txhim Kho Txheej Txheem Zoo Siab txhais tau tias kev ua kom zoo tshaj qub, txuag cov sij hawm ntau thiab nce zuj zus. Rau cov qhov rooj thiab cov khw muag khoom, nws muaj kev tawm suab zoo, thiab nws yog qhov yooj yim rau cov qhov rooj thiab lub tsev lag luam tuaj tsim kho tus qauv ntawm txhua feem ntawm kev ua haujlwm ntawm qhov kev cob qhia. Thiab cov khw thiab qhov rai lag luam tsis tas yuav siv ntau lub sijhawm thiab lub zog los tswj qhov kev txiav txim siab ntawm qhov kev cob qhia raws li yav dhau los, tuaj yeem siv cov cuab yeej tshiab thiab kev tshawb nrhiav thiab kev txhim kho ntawm cov khoom tsim cov khoom txhuas, kev tshawb nrhiav thiab kev tsim kho ntawm qhov rooj thiab lub qhov rais, thiab yuav ua li ntawd tsav cov nqi nce ntawm txhuas qhov rais. Ua kom muaj cov khoom ua kom zoo nkauj tshaj qhov rais.
4: Kev nce qib yog ib qho tseem ceeb ntawm txoj kev txhim kho ntawm qhov kev ua tau zoo ntawm cov qhov rooj thiab qhov chaw lag luam, thiab nws yuav pab tau rau cov neeg ua lag luam thiab cov lag luam kom tuaj koom nrog txoj kev lag luam. Ntau tus kws muag khoom yuav mus rau ntau lub qhov rooj thiab cov kws lag luam qhov rai kom nkag siab txog kev tswj kev ua haujlwm, kev ua haujlwm ntawm haujlwm thiab lwm yam. Tom qab tag nrho, lub pob ntseg yog fab xav hauv siab thiab pom kev ntseeg. Qhov kev vam meej ntawm qhov kev cob qhia ntawm rooj sib tham tuaj yeem muab lub qhov rooj thiab qhov rai tuaj yeem ua tus lav zoo, kom lub qhov rooj thiab qhov chaw muag khoom tuaj yeem muaj cuabkav ntxiv. Tom qab tag nrho, leej twg xav nrhiav ib lub qhov rooj thiab qhov rais lag luam kom tuaj koom, tsis yog cia li nrhiav lub qhov rooj tsim khoom tsawg thiab lub tshuab fais fab.
