Ka'idodin gabaɗaya don zaɓin kayan shinge na sauti waɗanda masana'antun masana'antun sauti suka samar sune tsarin abin dogaro, tsawon rayuwar sabis, kyakkyawan aikin rage amo, farashin kayan tattalin arziki, karko, ƙarancin shigarwa, yanayin daidaitawa, kyakkyawan bayyanar, da dai sauransu Le ...
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