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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
an engineer concerned with the design and construction of aircraft
the branch of engineering science concerned with the design and construction of aircraft
the branch of engineering science concerned with the design and construction of aircraft
the branch of engineering science concerned with the design and construction of aircraft