Ihe eji eme ihe na-ahụkarị ka a na-eji ihe dị iche iche dị iche iche eme ihe na usoro mkpochapụ. N'ebe a, anyị nwere ike were ihe atụ nke usoro extrusion PVC. Ụfọdụ ihe ndị ọzọ bụ polyethylene, acetal, naịlọn, acrylic, polypropylene, polystyrene, pol ...
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