By using magnetic detection technology, Chinese experts and scientists developed a powerful magnetic detector. The magnetic detector can detect any submarine or any object made of metals with high accuracy in distinguishing. Seems that the Chinese are preparing to strengthen their shores with yet another invention.
Hey, IF you are interested about geopolitics, see this : https://steemit.com/politics/@bolgan/thucydides-trap-geostrategy-and-geopolitics
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