1. Nau'in tsufa nau'in kayan polymer kayan aikin polymer a cikin aiwatarwa, adanawa da amfani, saboda cikakken aikin abubuwan ciki da na waje, kaddarorinsa suna raguwa sannu a hankali, don asarar ƙimar amfani ta ƙarshe, wannan sabon abu yana cikin tsufa. Polymer material...
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