12. Spandex: eriri sịntetik, ya bụ, etiti etiti, nwere njirimara nke elu elongation, elu elasticity, na mma acid resistance, alkali resistance, light resistance, and abrasion resistance. 13. Polypropylene: Polypropylene bụ aha nwere njirimara ndị China. N'ezie, ọ kwesịrị ...
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