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2. ??? ?????? ??? ????? 2. ???? ????? ???????Payam Nour University Computer Engineering Section Dr. Siavosh Kaviani. ????? ????? ????? ????( (DFD. DFD ?? ?????? ??????? ??? ?? ???? ????? ?????? ?????? ?? ?????? ??????? ????? ???????? ? ??? ????? ??????? ???.???
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