Txawm hais tias nws tau sib tsoo ntawm lub pob zeb hliav, lub pob zeb kom sib zog, lub sib tsoo sib xyaw lossis sab ntawm lub taub dej, qhov tseem ceeb ntawm lub ntsej muag kom sib txig sib luag yog tib yam, uas yog, qhov teeb meem ntawm kev sib cuag ntawm lub cuab yeej thiab cov cuab yeej ntse hauv qhov kev sib nrig sib zog. Hauv lub neej txhua hnub, feem ntau, peb yuav tsum tiv thaiv kev puas tsuaj rau cov khoom siv. Tus ntse hliav tshwj xeeb yog kev txhob txwm ua kev puas tsuaj rau qhov seem kom paub meej tias cov hniav tawg tiav. Tau hais tias, koj yuav nkag siab tias tus yuam sij rau ntse yog lub kaum sab xis. Ntawd yog, los ntawm kev txav mus rau txhua qhov chaw ntawm lub kaum sab xis uas tsim nyog, cov hlau ntau dhau ntawm ob tog ntawm tus hniav yog polished.
Kev lag luam tab tom txhim kho raws li tag nrho. Cov whetstone uas muag hauv khw muaj tsawg dua 10 yuan yog whetstone uas zoo heev. Lub hardness thiab roughness ntawm ob qhov chaw sib tsoo muaj qhov sib txawv. Nws yog txhim kho rau qee qhov twg. Nws hloov cov tsoos whetstone vim nws txuag lub sijhawm thiab kev rau siab. Hauv lwm lo lus, cov tsoos whetstone tuaj yeem tsuas yog siv ua lub luag haujlwm ntxiv rau whetstone ntawm qhov zoo tshaj plaws. Tom qab riam txiav ntse, nws yog qhov tseem siv rau kev npaj ua. Yog tias koj rab riam yog qhov nyuaj tiag tiag, nws tau kwv yees tias cov nyhuv ntawm tsoos whetstone phiaj xwm yuav tsis muaj tseeb, ha ha.
Los ntawm txoj kev, Kuv tuaj yeem lav tias Whetstone tuaj yeem zom koj rab riam. Tab sis kuv xav ua lwm lub ntsiab. Yog tias koj cov cuab yeej yog qhov nyuaj tiag tiag, nws tsis tshua xav tau los ua kom ntse, yog li tsis tas yuav txhawj txog qhov teeb meem no.
Koj daim tawv lo lo yog qhov khoom tshaj tawm los ntawm kev ua lag luam lossis chaw tsim khoom. Ib qho tsis tas yuav yog qhov zoo, thiab lwm qhov yog nws yeej tsis haum rau tsev neeg siv. Vim li cas koj thiaj hais li ntawd? Cov nqaij muag hauv cov zaub ua liaj ua teb siv nws ntau zaus. Ntawd' s vim tias cov neeg tua tsiaj' s rab riam ntse ntse tau dhau los ua ib hom prop hauv lawv cov lag luam. Dhau li, lawv cov riam yog ib qho lossis nees nkaum riam riam, uas yog xeem ntse. Nws tsis' t txawm zoo li cas, qhov kev lag luam loj yog lwm yam. Dab tsi' s ntxiv, lawv tau ua tiav qhov kev txiav txim siab kom pom tseeb hauv qhov lawv ua tau ntau xyoo dhau los. Yog tias koj siv tus hlais lo rau hauv tsev, nws yuav yog qhov khoom mob heev. Lub suab nrov nrov thiab nws siv sijhawm. Leej twg tuaj yeem sawv taus nws? Dhau li, koj yuav tsum paub tswj lub kaum sab xis thiab cov txheej txheem kom nruj, uas yog qhov mob dhau.
