The frequency component becomes very rich after the signal is phase-modulated. Due to the character...

Cobalt (CO), derived from kobold, means "the devil" (its ore is so toxic that it once...

On February 1, the State Intellectual Property Office announced the 11th China Patent Awards in Bei...

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1 World Copper Resources The global copper resources are abundant. According to the US Geological ...

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Self-dumping: Not Self-dumping ...

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