午夜不卡AV免费,午夜福利理论片在线观看,免费A级毛片在线播放不收费 ,无码AV天堂亚洲内射夫妻

Construction of new road-rail Yangtze bridge begins in east China
Xinhua  |  Updated: 2022-01-07  |  Views: 32911

The construction of a new road-rail bridge over the Yangtze River, China's longest river, began on Tuesday in east China's Anhui Province.

The 11.88-kilometer bridge in the city of Tongling will have a six-lane expressway with designed speeds of 100 kilometers per hour on its upper deck, and four railway tracks on its lower deck.

Two of the tracks will be reserved for passenger trains with designed speeds of 250 kilometers per hour, and the other two will accommodate freight trains.

"The bridge, with a major span of 988 meters, is designed with a cable-stayed and suspension structure, with functional requirements and economic factors taken into account," said Qiu Feng from the China Railway Major Bridge Reconnaissance &Design Institute Co., Ltd., which is in charge of the design of the bridge.

Compared to single-structure bridges, cable-stayed and suspension bridges have longer spans and are safer, allowing the smoother passage of high-speed trains.

Construction is expected to be completed in 2025.


中文字幕奈奈美被公侵犯| 污污污污污污www网站免费| 欧美成人在线视频| 成 人 黄 片免费观看| 国产97人人超碰cao蜜芽| 国产又大又粗又长硬又紧又爽| 美美女高清毛片视频免费观看 | 国产精品毛片无码| 国产色在线 | 日韩| 我被六个男人躁到早上| 午夜视频在线观看| 激情无码人妻又粗又大| 银杏视频在线观看www| 国产成人精品999在线观看| 部长的夫人的味道中字| 久久自己只精产国品| 潮喷失禁大喷水AⅤ无码| 欧美性xxxxx极品少妇| av在线播放| 蜜桃国产乱码精品一区二区三区| 污视频在线观看| zo0o与人xxx欧美另类| 欧美激情综合色综合啪啪五月 | japanese老熟妇乱子伦视频| 久久精品无码一区二区三区免费| 我和公发生了性关系公| 日本黄色视频| 天干天干天干天干日天干| 丰满少妇三级全黄| 高清欧美性猛交XXXX黑人猛交| AV在线亚洲欧洲日产一区二区 | 麻豆亚洲AV永久无码精品久久| 一边捏奶头一边啪高潮会怎么样| 亚洲日本一线产区二线产区| 无码性午夜视频在线观看| 黑人巨茎大战白人女40CM| 赶尸艳谈在线观看| 男男gv资源chinese18| 亚洲无码一区| 免费国产又色又爽又黄的网站| yyy6080韩国三级理论|