Ukucekelwa phansi kwezinto ngenxa yokukhanya kwelanga okungokwemvelo kanye nomswakama kubangela ukulahlekelwa kwezomnotho okungenakulinganiswa unyaka ngamunye. Umonakalo ikakhulukazi uhlanganisa ukufiphala, ukuphuzi, ukuguquguquka, ukuncipha kwamandla, i-embrittlement, i-oxidation, ukuncipha kokukhanya, ukuqhekeka, ukufiphala kanye ne-pulverization. Imikhiqizo kanye nezinto...
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