Cov khoom siv ntawm peb tus sib txawv, cov tsos zoo li txawv, thiab cov txheej txheem ntawm kev siv yog txawv, tab sis cov haujlwm ntawm peb qho zoo ib yam, thiab lawv txhua tus siv los ua tus riam ntse dua.
Hliav zeb:
Ib qho whetstone yog lub pob zeb uas siv los tuav rab riam. Ib qho zeb xuab zeb tuaj yeem hlais tau - qhov av grey clayey sandstone yuav zoo tshaj. Quartz kuj tseem zoo, tab sis nws tsis tshua muaj. Granite tseem muaj. Qhov tseem ceeb yog cov hniav tawg yuav tsum ntse thiab ruaj, tsis raug rau chipping.
Riam rab riam:
Tam sim no, rab riam rab riam yog ib hom kev tshawb fawb, tswv yim, siv tau txiaj ntsig thiab yooj yim rab riam rab riam yog qhov tshiab tsim. Haum rau txhua hom riam cov chav ua noj, riam sab nraum zoov, txiab, Damascus riam thiab cov hniav riam.
Hliav qws
Cov chaw muag nqaij uas pom muaj nyob hauv khw muag zaub tsuas yog pab ua kom hniav tawg zoo dua ib ntus. Yog tias nws dhau los ua npub, nws tsuas yog tuaj yeem ua tau ntse nrog nrog whetstone.
