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Chapter 796 was ordered again
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Chapter 798 Far from a steel power
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... of international railway rail technology.
After thinking about it and organizing his words, Zhao Guoyang recounted in a calm tone: "As we all know, rails are divided into railway rails, light rails, conductive rails, and crane rails according to China's national standards and the standards of the Ministry of Metallurgical Industry. .”
"Correspondingly, each country in the world also has its own standards for the production of steel rails, and their classification methods are al ...
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