Cov kab xev tshuab yog cov cuab yeej tseem ceeb hauv cov ntawv ua lag luam, cov kab xev tuam txhab yuav luag txhua hnub los siv cov cuab yeej no, yog tias muaj qhov yuam kev yuav ua rau muaj kev cuam tshuam rau cov txheej txheem ntau lawm, cov neeg tsim khoom kuj yuav poob. Feem ntau hais lus, yog tias cov neeg ua haujlwm ib txwm tsis saib xyuas kev saib xyuas txhua hnub, lub tshuab txiav tawm feem ntau yuav tshwm sim qee qhov teebmeem thorn, txhawm rau daws cov teeb meem me me no los ntawm ib lub sijhawm, peb suav sau cov ntsiab lus hauv qab no feem ntau ntsib teeb meem rau koj siv, Kuv vam tias yuav pab koj:
Ua ntej, daim kab xev txiav tshuab tsis zoo nkauj. Cov xwm txheej no feem ntau yog vim cov ntawv tseem ceeb yog siv tsis tau, tsuav hloov pauv kom tau raws li qhov xav tau ntawm txoj kab puab sab hauv ntawm cov ntawv tseem ceeb, ntxiv rau kev siv cov tshuab rewinding hauv cov txheej txheem rewinding, kuj tuaj yeem zam qhov slitter rewinding tshuab Cov.
Thib ob, lub ntsuas ntsuas ntsuas dej tsis raug. Qhov teeb meem no tuaj yeem ua lub log log ob lub log tib lub tib lub sij hawm sib cuag nrog cov kab noj mov, thiab ntawm lub log log kom ua lub cim rau dov 5 rau lub ntsuas 'meter' lossis hloov lub ntsuas taub.
Thib peb, txiav qhov ntim ntawm cov khoom siv los ntawm kev sib. Qhov no feem ntau yog qhov winding nro tsis yog, kho qhov tsim nyog winding nro ntawm daim ntawv txiav tshuab, winding siv xovxwm yob thiab cov khoom siv txiav tom qab yob mus rau hauv cov ntawv winding tub ntxhais.