亚洲日日精AV无码区A片_亚洲区高清_4455国产精品视频_亚洲男人天堂一区_未满十八18禁止午夜免费_777爽死你无码免费看一二区

Welcome to Aigre?

more>>Industry Overview

News

The Origin of Railway Gauge Standards
addtime:2022-04-12click:443


The history of railway gauge can be traced back to the coal mine transportation era in the UK, where the track spacing was set at four feet eight and a half inches (1435mm), which later became the standard gauge for railway systems worldwide. In 1825, Stephenson, the inventor of the steam locomotive, adopted this gauge, and with the spread of railway technology, this standard gradually gained adoption in the United States, Germany, and other regions.

China's railway construction began in the 1880s, when foreign powers exported railway technology and products to China through loans, bringing various technical standards with them. Therefore, China's railway gauge system initially showed diverse characteristics, with British, French, Russian, and other standards coexisting. This chaotic state of gauge systems persisted for nearly a century until the late Qing Dynasty, when there was a gradual move towards unification.

During the process of unifying the gauge system, the influence of the UK was the most significant. Since most of China's earliest railways were built or assisted by the British, the British gauge was widely used in China. However, some railways also adopted standards from other countries, such as the French standard for the Lu-Han Railway and the Russian standard for the Eastern Qing Railway.

To address this issue, the Chinese government and relevant authorities began to carry out gauge system reforms. They gradually unified the national railway gauge system by formulating relevant regulations and standards. Ultimately, the standard with a British gauge of four feet eight and a half inches, Martin steel as the material, and a mainline track weight of 85 pounds was established as the standard for China's railways. This standard not only applies to railway mainlines but has also been gradually extended to other railway lines.

Since then, China's railway gauge standard has been followed to this day and continues to develop and improve. The establishment of this standard has not only improved the operational efficiency and safety of China's railways but also laid a solid foundation for the modernization of China's railway development.


主站蜘蛛池模板: 久久成人国产精品入口 | 亚洲一区无码精品色 | 日韩免费无码人妻波多野 | 亚洲AV国产AV一区无码 | yy1111111少妇影院光屁股 | 狠狠噜天天噜日日噜无码 | 亚洲一区自拍高清亚洲精品 | 1区2区3区在线观看 日韩综合一区二区 | 男操女免费网站 | 天天操天天草 | 无码人妻精品一区二区三区东京热 | 亚洲色婷婷一区二区三区 | 国产超碰 | 国产黄色免费观看 | 东京热T0KY0综合久久 | 女十八毛片aaaaaaa片 | 免费一级毛片在线播放放视频 | 亚洲日本欧美中文幕 | 99精品众筹模特自拍视频 | 偷拍盗摄66av99 | 9191成人国产在线播放 | 老司机午夜免费精品视频 | 本土又黄又粗天天躁性爱视频 | k8久久久一区二区三区 | japanese55丰满熟妇 | 欧美激情视频一区二区三区 | 夜夜爱av| 日本黄视频在线观看 | 亚洲精品无码久久久影院五月天 | 成人做爰高潮片免费视频九九九 | 中文字幕人妻熟女人妻洋洋 | 午夜影视啪啪免费体验区深夜 | 亚洲精品午夜视频 | 久久中文字幕在线观看 | 在线免费观看黄色大片 | 中字无码av高清在线播放 | 福利在线一区 | 中文字幕在线不卡播放 | 亚洲精品TV久久久久久久久J | 波多野结衣绝顶大高潮 | 男同网gv免费视频网站 |