Kuj tau hu ua tag nrho cov profile welded los yog tag nrho welded. Lub comer / puag cov pob qij txha muaj txhua cov qauv ntawm tus qauv ntawm cov tswv cuab txuas ntxiv welded suav nrog soffits suav nrog cov soffits suav nrog cov sooffits suav nrog cov soffits suav nrog cov soffits suav nrog Rabbet, ntsej muag, thiab rov qab los.
