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Chapter 516 Painstaking research
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Chapter 518 Standard model
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... the earth's center, I am confident that the sunset will be rescued from it within ten years!"
Shen Yuan smiled bitterly: "How can it be so easy, even if the positioning is accurate, we have to develop a geo-nuclear spacecraft! Although the existing new solid materials can be used as the geo-nuclear spacecraft shell, this material is too heavy , Using this material to make the shell, our engine can only barely propel it to sail in the mantle, but inside the core of the earth, it is diffic ...
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