12. I-Spandex: I-synthetic fiber, oko kukuthi, i-frame core, ineempawu zobude obuphezulu, ukuqina okuphezulu, kunye nokuxhathisa okungcono kwe-asidi, ukuxhathisa kwe-alkali, ukuxhathisa ukukhanya, kunye nokuxhathisa i-abrasion. 13. I-Polypropylene: I-Polypropylene ligama elineempawu zesiTshayina. Enyanisweni, kufuneka...
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