Qee tus neeg muas zaub xav tias kuv tsis' t paub tias yam xev zoo lossis tsis zoo. Raws li ntev npaum li tus nqi pheej yig, nws tuaj yeem txuag nqi thiab lub hnab ntim yeej' t yuav tawg.
Piv txwv, tus tsiaj yas steel ntim siv tau muab faib ua ntau qib, thiab qhov sib txig ntawm cov khoom siv rov ua dua tshiab yog txawv rau cov qib sib txawv ntawm cov txheej txheem ntim. Qhov qis qhov kev faib ua feem ntawm cov khoom siv rov ua dua tshiab, qhov zoo dua qhov zoo ntawm kev ntim khoom. Txhua tus neeg uas siv cov pob ntim tau paub tias hloov chaw ntawm qhov chaw tsis zoo ntawm cov pob ntim cov tsiaj ntawv rau ib qho loj ntawm kev saib xyuas ntawm cov neeg ntim khoom. Kev siv ntawm cov khoom siv zoo ntim hauv kev siv, qhov kev coj ua yog li qub hnav, tuaj yeem ua tiav qhov kev pab cuam lub neej, thiab kev siv ntau dhau los ntawm impurities packing siv, tsis tsuas yog hnav ntawm qhov coj ntawm qhov nrawm nrawm, qhov kev pab cuam lub neej txo qis heev. Nws tseem yuav ua rau lub vuam sij hawm ntev dua, vuam kev ua haujlwm qis dua, lub zog ntawm vuam nto tsis tsim nyog, yuav muaj kev pheej hmoo ntawm cov pob xoob
Thaum nws siv nyob rau hauv cov khoom siv tsis siv neeg, qhov kev siv ntawm txoj siv tawv tsis ruaj khov, uas yuav ua rau cov xwm txheej hauv qab no: tuab tsis sib luag, tsis sib luag dav thiab ntxig qhov chaw. Yog li ntawd hauv cov txheej txheem ntim tsis tuaj yeem ua si ntawm txoj siv sia, ua si tsis nruj ntawm txoj siv, khi khi thiab lwm yam tshwm sim. Nws cuam tshuam ncaj qha rau lub sijhawm tsim khoom thiab kaw tus nqi ntim ntawm cov khoom ntim.
Yog li qhov zoo ntawm kev ntim khoom tau muaj kev cuam tshuam ntawm lub ntim rau qee yam. Qhov tseem ceeb tshaj plaws yog xaiv cov khoom uas raug. Yog tias tus nqi ntau dua, nws tsis raug nqi. Yog tias tus nqi tsawg, cov txij nkawm nqi ntawm pob yuav nce, uas tseem yog ib qho kev siv nyiaj.