Cov ntsiab lus hauv qab no yuav tsum tau them nyiaj mloog thaum txhim kho lub tshuab ua yeeb nkab
1. Rau cov khoom siv raw, yog tias koj xav siv cov hlau tsis muaj hlau txuas cov khoom siv rau kev ua haujlwm ib txwm muaj, koj yuav tsum tau them sai sai rau cov teeb meem uas tshwm sim thaum thauj mus los lossis thauj khoom thiab thauj khoom ntawm cov khoom siv raw, thiab sim tsis txhob ua pob los yog khawb.
2. Rau qhov chaw siv, chaw ua haujlwm yuav tsum ruaj khov, thiab qee qhov chaw pw yuav tsum tau ua ntawm lub rooj ua haujlwm kom rov kho dua, yog li kom tsis txhob khawb cov yeeb nkab hlau ntawm lub rooj ua haujlwm thaum lub sijhawm ua haujlwm.
3. Thaum lub sij hawm txiav kev tsim, siv txiav txiav los yog ntshav txiav rau cov ntaub ntawv raw kom tau welded. Thaum txiav, muab txoj hauv kev nrog qee yam zoo li roj hmab.
4. Tom qab siv cov khoom siv hlau tsis muaj hlau txuas rau vuam, ntxuav qhov chaw hauv lub sijhawm kom ntseeg tau tias kev tsim kho zoo tshaj plaws.
5. Rau kev ua tiav kev tsim vuam, nws yog qhov yuav tsum tau ua txoj haujlwm zoo hauv kev tiv thaiv kev tsim kho cov khoom tiav, sim tsis txhob kov thiab lwm yam tshwm sim, thiab tiv thaiv kom tsis txhob muaj kuab paug theem ob.
