1. Ua tib zoo saib xyuas qhov vuam: Yog tias lub rooj zaum folding yog cov qauv hlau, xyuam xim rau qhov vuam yuav tsum du thiab tsis muaj qhov khoob, thiab cov txheej yuav tsum zoo ib yam thiab mos.
2. Ua tib zoo saib xyuas qhov tuab ntawm cov yeeb nkab steel: yog tias lub rooj zaum folding yog cov yeeb nkab aluminium alloy, lub thickness ntawm cov yeeb nkab steel yog li 1.2 hli, thiab nws yog qhov zoo dua kom tsis muaj impurities.
3. Ua tib zoo saib xyuas qhov kev ruaj khov: nyob ntawm qhov zoo ntawm tus ncej, koj tuaj yeem siv ob txhais tes los co cov khoom rov qab, sab laug thiab sab xis, thiab co nws, uas txhais tau hais tias tus ncej zoo.
4. Ua tib zoo saib xyuas qhov zoo ntawm daim ntaub qhwv: yog tias koj yuav tawv, koj tuaj yeem hle ib qho chaw nrog ob lub ntsis ntiv tes thiab rub nws. Nws xav tias muaj zog thiab muaj kev rov zoo.
5. Kev sim zaum: Sim zaum ntawm tus neeg kom nkag siab txog nws qib kev nplij siab, hloov txhua lub kaum sab xis, thiab tom qab ntawd yuav nws tom qab kev pom zoo.
