Tam sim no, cov zis ntawmwelded cevnce me ntsis, kev khiav hauj lwm tus nqi ntawm welded yeeb nkab Hoobkas txo me ntsis, kev ua lag luam kev txaus siab rau kev ua lag luam tsis zoo, thiab cov khoom muag hauv lub Hoobkas nce synchronously.Raws li kev kis tus kab mob txuas ntxiv mus, qhov kev xav tau qis qis thiab lub davhlau ya nyob twg yog qhov nyuaj rau kev txhim kho, thiab kev lag luam lig kev lag luam tsis muaj zog, tab sis kuj tseem muaj cov xwm txheej ntawm lub xyoo kawg kom tau raws li lub sijhawm kawg, kev rov qab ua dua.Hauv cov ntsiab lus, nws cia siab tias cov nqi hluav taws xob hauv tsev welded tseem yuav ua haujlwm tsis muaj zog rau hnub no.