Zowonongeka zomwe zimakonda kuchitika m'malo owotcherera a arc ndi ma pores, ming'alu yamafuta, ndi ma undercuts. 1. Mibulu. Mavuvu nthawi zambiri amapezeka mkatikati mwa weld. Chifukwa chachikulu n’chakuti haidrojeni imabisidwabe muzitsulo zowotchedwa ngati thovu. Chifukwa chake, njira zothetsera ...
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