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MTL - The Return of the Black Technology of Immortal World - v3 Chapter 261 Medium Lingshi
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v3 Chapter 260 underground base
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v3 Chapter 262 iron ore
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... e original density, the three layers of metal plates added inside have minimized the possibility of cosmic rays penetrating the protective layer.
After adding a cover and cutting the mountain next to it, it became a large space with a height of more than 100 meters and a diameter of several hundred meters.
In the center of the space, you can see the supporting columns hanging down from the ceiling.
Although the support column is also an all-metal structure, its diameter is o ...
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