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... Therefore, it is the first time, the second time, the third time ... the Nth large speedup in the country.
There are three problems that have plagued Huaxia's railway transportation for a long time. One is insufficient railway operating mileage, the other is insufficient operating speed and insufficient traction load.
On the one hand, the railway department hopes to increase the speed of passenger trains to improve the operating efficiency of existing lines, and on the other hand, ...
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