Txhawm rau txuas lub neej ntawm riam, ntawm no yog qee cov lus qhia thiab cov kauj ruam tseem ceeb:
1. Ntxuav cov riam tsis tu ncua kom tsis txhob muaj cov khoom noj uas seem tshuav lossis lwm yam kab mob ntawm cov hniav.
2. Tom qab siv, qhuav cov hniav thiab tuav nrog ib daim ntaub huv si los yog daim ntaub so ntswg kom tsis txhob muaj cov khoom seem uas ua rau xeb.
3. Siv ib txheej nyias ntawm cov roj ua noj los yog cov roj los tiv thaiv xeb ntawm cov hniav los tsim cov txheej txheem tiv thaiv kom tsis txhob oxidation thiab corrosion.

Kev siv kom raug:
1. Thaum siv riam, tsis txhob sib tsoo ncaj qha nrog cov khoom tawv lossis txiav cov khoom tawv heev kom tsis txhob muaj kev puas tsuaj rau cov hniav.
2. Xaiv txoj kev txiav kom raug raws li lub hom phiaj ntawm rab riam, xws li siv cov txiav sib txawv thiab lub zog los tuav cov khoom sib txawv.
Cia kom zoo:
1. Khaws cov riam hauv qhov chaw qhuav, qhov cua thiab noo noo kom tsis txhob xeb los ntawm qhov chaw ntub dej.
2. Siv rab riam los yog rab riam los tiv thaiv cov hniav thiab tiv thaiv cov hniav los ntawm kev sib tsoo lossis khawb nrog lwm yam khoom.
Zam kev tsim txom:
1. Tsis txhob siv riam rau lub hom phiaj uas tsis yog tsim, xws li lub kaus mom qhib lossis lub hau ntswj, kom tsis txhob ua rau cov hniav puas tsuaj.
2. Tsis txhob muab riam rau qhov kub thiab txias heev kom tsis txhob deformation lossis puas rau cov khoom.

Tsis tu ncua Sharpen Riam:
1. Siv lub pob zeb los yog rab riam ntse ntse kom cov hniav ntse.
2. Ua tib zoo saib lub kaum sab xis thiab lub zog kom zoo thaum txhuam hniav kom tsis txhob sib tsoo lossis ua rau cov hniav puas.
Ua tib zoo xaiv cov khoom siv:
Thaum yuav riam, xaiv cov ntaub ntawv zoo thiab cov khoom siv tes ua haujlwm kom ntseeg tau tias lub neej ntev thiab kev pab cuam ntawm riam.
Los ntawm kev ua raws li cov lus qhia thiab cov kauj ruam saum toj no, koj tuaj yeem txuas lub neej ntawm riam thiab ua kom nws nyob rau hauv qhov zoo. Nco ntsoov, kev saib xyuas kom raug thiab siv yog qhov tseem ceeb rau lub neej ntawm riam.
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