Flux Cored Vuam Hlau Ntau Lawm Kab
Cov kab ntau lawm no suav nrog cov txheej txheem tseem ceeb ntawm cov khoom siv flux-cored hlau, tab sis tsis suav nrog kev thauj mus los, cov khoom siv hoisting, cov cuab yeej tshuaj ntsuam xyuas thiab cov khoom siv ...
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