পৃথিবীর সবচেয়ে বড় ইঞ্জিনকে কিভাবে জাহাজে ইন্সটল করা হয়। How the biggest ship engines are installed

Описание: পৃথিবীর সবচেয়ে বড় ইঞ্জিনকে কিভাবে জাহাজে ইন্সটল করা হয়। How the biggest ship engines are installed #ship #technology #banglafacts

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