السفن، خطوط بليمسول

ما هي خطوط بليمسول، وأين توجد؟

Keep going السفن، خطوط بليمسول 16 يوليو 2014

بالرغم من أن الحديد والصلب يغوصان في الماء فاننا نجد أن السفن المصنوعة منهما تطفو . وهذا يعزى على وجود تجويف كبير بداخلها فيصبح حجمها...

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