Inkcazo yenkqubo ye-welding 一.Ukulungiswa ngaphambi kokufakwa kwe-welding: 1: Umqhubi kufuneka ahambe ngokufunda okukhethekileyo kwethiyori kunye noqeqesho olusebenzayo, ufumane isatifikethi somsebenzi, unokuzibandakanya kwi-welding, umsebenzi wokusika.2: Jonga ukuba imizobo ichanekile kwaye igqityiwe, funda ngononophelo ...
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