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Abstract Dr. Mao Heguang and Dr. Hemley, Ph.D. in geophysics, experimented with the patented

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Abstract On November 14, the 20th Shenzhen International Hi-Tech Fair (hereinafter referred t

Information is the resource of existence, information is the source of knowledge, information is t

First, the introduction of nylon Nylon (PA) means a plastic composed of a polyamide resin. Such a r

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