Ọkpụkpụ ígwè welded dị elu ma ọ bụrụ na njikwa mmepụta dị mma, a ga-ahapụ ngwakọta nke ọla a wụrụ awụ ma ọ bụ oxide. Ọ bụrụ na ịcha weld sample polishing, etching, na hụrụ n'okpuru anya mikroskopu, okpomọkụ-emetụta mpaghara na-eme ka a drum, n'ihi na nsọtụ nke warara na-abanye ...
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