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Chapter 408 - 406 Several Difficult Problems
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... engineering discussed, "Many technological advancements are essentially advancements in material science."
"If we lack rare earth elements, it’s difficult to make progress in material science, naturally making it impossible to develop powerful engines. Even some composite ceramics require rare earth elements."
How important are rare earth elements?
In material science, they are as essential as oil!
Take engines for example: In the era of turbojet engines, the gap ...
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