Mbibi nke ihe site na ìhè anyanwụ na mmiri mmiri na-akpata mfu akụ na ụba na-enweghị atụ kwa afọ. Ihe mebiri emebi na-agụnye ịla n'iyi, ịcha edo edo, mwepu, ike na-ebelata, embrittlement, oxidation, ibelata nchapụta, mgbawa, blurring na pulverization. Ngwaahịa na ihe...
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