Underwater Metro: If you live in Metro City or have ever visited Metro City, then you must have seen your Metro. May have also traveled in it. You must have seen that the metro runs on the ground, over the bridge and underground. This is a common thing, but have you ever thought that if the metro starts running under water? Can’t say anything whether you have thought about it or not, but we can definitely tell that the technology of underwater metro has come. The interesting thing is that…
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