Enwere ike kewaa akpụkpọ ụkwụ nchekwa n'ọtụtụ ụdị dịka ọrụ dị iche iche si dị.A na-ejikarị ihe polyurethane eme ihe naanị site na ịkpụzi injection otu oge, nke nwere uru nke nguzogide mmanụ, na-eguzogide ọgwụ, acid na alkali resistance, mkpuchi, mmiri na-eguzogide, na ìhè.2-...
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