1 jonga iinzipho ezintlanu Okwangoku, kukho iindidi ezintathu zezixhobo ezinezizipho ezihlanu kwizitulo: intsimbi, inayiloni, kunye nealloyi yealuminiyam. Ngokweendleko, ialluminiyam ialloy>nylon>intsimbi, kodwa izinto ezisetyenziselwa uphawu ngalunye zahlukile, kwaye akunakutshiwo ngokungqongqo ukuba ialluminiyam ialloy b...
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