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Строительство Written by Super User 908
Транспорт Written by Super User 927
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Двигателестроение Written by Super User 924
Машиноведение Written by Super User 888
Биологические науки Written by Super User 927
Химические науки Written by Super User 885
Физика Written by Super User 856
Астрономия Written by Super User 916

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