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Ị chetụla echiche ihe mere e ji kee ọtụtụ ngwaahịa n'ime ihe nkiri na-egbuke egbuke ma doo anya? Nke ahụ nwere ike ịbụ ihe nkiri BOPP—ihe nkiri ama ama nke e ji ekpuchi ngwugwu. BOPP na-anọchite anya Biaxially Oriented Polypropylene, ihe nkiri plastik siri ike ma dị fechaa nke a na-eji gburugburu ụwa maka nri, ihe ịchọ mma, akara ngosi, na ihe ndị ọzọ.