Tsib cov ntsiab lus kom ntev mus rau ntawm qhov chaw ntawm cov khoom seem ntsug zeb xws li kev sib tsoo chais, kev sib tsoo ntxhuav, cov kab ntsaws, thiab lwm yam.
Taw tes yog xaiv cov khoom siv. Cov ntaub ntawv sib txawv yuav ua rau txawv txav rau sib tsoo rollers , sib tsoo ntxhuav thiab cov kab ntsaws. Cov ntaub ntawv uas muaj ntau impurities, los yog ntau tshaj qhov muag yuav ua rau muaj kev puas tsuaj dua, thiab yog tias cov khoom ua rau cov khoom qaub ncaug nce ntxiv, qhov khoom seem yuav ua rau ntau, ces nws yog qhov tsim nyog xaiv cov khoom tsim nyog.
Taw tes ob yog txawm khoom noj. Cov ntaub ntawv nyuaj yuav tsum ua tib zoo xav thaum txiav txim siab txog cov khoom siv loj. Nquag hais lus, cov khoom sib piv zog hauv qab 3cm inch yuav zoo rau lub tshuab.
Taw tes peb yog qhov txwv ntawm cov hlau rau hauv cov menyuam ntsuag rau cov menyuam. Thaum tsim nyog, yuav tsum muaj hlau-tshem tawm ua ntej ntaub ntawv mus rau hauv lub zeb kom tsis txhob muaj hlau qhov kev puas tsuaj rau qhov chaw seem.
Taw tes plaub yog lub sijhawm hloov cov khoom seem. Qhib lub hau npog thaum kuaj lub tshuab, thiab hloov cov khoom seem thaum tsim nyog. Tshem cov ncej uas tseem ceeb ua ntej pib zeb los xyuas seb puas muaj kev txawv txav. Deal nrog nws ib zaug ceeb toom ib yam dab tsi txawv txav kom tsis txhob muaj kev khiav haujlwm tsawg.
Taw tes tsib yog daim tshev ntawm txoj hlua khau hauv lub hau npog. Ntxuav cov kab nrig thaum hloov qhov kev sib tsoo ntawm qhov kev sib tsoo thiab hloov qhov chaw seem ntawm seem txeej.
