Ntsej muag.
Cov qib ntse ntse yog qhov ntsuas tseem ceeb rau kev xaiv riam hauv chav ua noj, yog tias rab riam hauv chav ua noj yog blunt, thaum txiav tav los yog nqaij yuav nyuaj heev.
Qee cov riam hauv chav ua noj tau pib ntse, tab sis tsis ntev ua ntej, peb yuav tsum xaiv rab riam hauv chav ua noj kom pom tias nws tuaj yeem ntse tau ntev.
Hardness.
Xaiv lub sij hawm ntawm chav ua noj riam los txiav txim siab hardness, vim hais tias yog tias koj siv txawv, cov hardness yuav tsum tsis yog tib yam.
Siv los txiav cov zaub mov nyuaj dua, zoo li cov tav tsis xaiv qhov nyuaj, yooj yim kom tawg.
Xws li slicing riam, tuaj yeem xaiv softness.
Qhov degree ntawm xeb.
Feem ntau ua noj cov phooj ywg paub, chav ua noj riam xeb siv rau lub sijhawm ntev tom qab lub rooj sib tham, ntawm lawv, cov riam carbon steel yog yooj yim rau xeb.
Yog hais tias nws tsis yog feem ntau ua noj thaum lub sij hawm zoo tib yam,
Feem ntau ua noj muaj roj tsis yooj yim rau xeb)
, tsis txhob xaiv carbon steel riam thiab.
Khoom siv.
Cov ntaub ntawv sib txawv rau cov riam tsis zoo ib yam, nws yog ib qho tseem ceeb ntawm dao tuav.
Nqi ua haujlwm.
Nqe kuj yog peb qhov kev yuav khoom yog qhov tseem ceeb ntawm kev txiav cov cuab yeej.
Cov cuab yeej txiav zoo yog tso cai rau peb siv sijhawm ntev dua, tab sis ntau tus neeg yuav tsum xav txog tus nqi.
Thov kom koj rab ntaj koj tuaj yeem yuav qee yam riam pheej yig, siv sijhawm ntev dua.
