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إكتشاف أشخاص جدد وإنشاء اتصالات جديدة وصداقات جديدة
the branch of engineering science concerned with the design and construction of aircraft
the branch of physics that deals with the emission and effects of electrons and with the use of electronic devices
the branch of mechanics that deals with the motion of gases (especially air) and their effects on bodies in the flow
the branch of mechanics that deals with the motion of gases (especially air) and their effects on bodies in the flow
the branch of mechanics that deals with the motion of gases (especially air) and their effects on bodies in the flow