亚洲欧美日韩中文字幕在线一区,亚洲日韩精品无码专区加勒比,亚洲精品成人无码中文毛片不卡,久久久久人妻精品一区二区三区,天天操天天摸天天操天天插,99国产午夜在线精品,国精品人妻无码一区二区三区喝尿,国产免费无遮挡吸乳视频下载,欧美激情一区二区三区成人久久片,av免费在线观看香蕉

  

World's Fastest High-Speed Train 
Undergoing Multiple Testing and Validation

 

     The world's fastest high-speed train, the CR450, has completed its prototype design and successfully rolled off the production line. Currently, the development team is conducting a series of scientific experiments and performance validations to pave the way for the train's early commercial operation. As a key project in the national "14th Five-Year Plan" for technological innovation, the CR450 represents another technological breakthrough based on the CR400 train currently in operation. The development team has carried out hundreds of extreme condition simulation tests on the newly applied permanent magnet traction motor. To reduce air resistance during high-speed operation, researchers have overcome challenges like resonance and heat dissipation, successfully encasing the entire bogie area beneath the train for the first time.
附件:
回到頂部