Abstract Rough set theory over two universes is a generalization of rough set model to find accurate approximations for uncertain concepts in information systems in which uncertainty arises from existence of interrelations between the three basic sets: objects. attributes. and decisions. In this work. https://safeersappliancers.shop/product-category/zanussi-zof35601xk-built-under-double-oven-in-stainless-steel/