日本无限资源_福禄影院午夜伦_美国av毛片_亚洲自拍在线观看_激情亚洲一区国产精品_999久久久久

Technology shields birds' habitat from train noise

Source: Xinhua| 2018-07-02 20:45:45|Editor: Liangyu
Video PlayerClose

GUANGZHOU, July 2 (Xinhua) -- A new high-speed railway began operation Sunday in Guangdong Province, without impacting the lives of tens of thousands of birds near the route.

The 357-km railway, which connects Guangdong's Jiangmen and Zhanjiang, is only 800 meters away from a habitat of over 30,000 herons in Xinhui District, Jiangmen, at the closet point.

To avoid bothering the birds, a vaulted shield was set up to cover a 2,036-meter section near the habitat, which consists of several islets covered by banyan trees.

Using sound absorption and insulation materials, the shield cost 187 million yuan (28.3 million U.S. dollars), according to Li Jianqiang, an engineer in charge of construction with the China Tiesiju Civil Engineering Group.

Tests showed that when a train passed at a speed of 200 km per hour, the sound monitored at the core area of the birds' habitat increased by 0.2 decibels, Li said. "It means that people and birds barely heard the noise."

The enclosed shield is the first of its kind and the developer is patenting the technology, according to China Railway Guangzhou Group Co. Ltd., the operator of the railway.

TOP STORIES
EDITOR’S CHOICE
MOST VIEWED
EXPLORE XINHUANET
010020070750000000000000011100001372964591
主站蜘蛛池模板: 丰满岳乱妇在线观看中字无码 | 国产精品亚洲АV无码播放 闷骚的老熟女人15P | 亚洲色图手机在线 | 妺妺窝人体色WWW网 粉嫩小仙女扒开双腿自慰 明星ai换脸二三区入口 | free性丰满白嫩白嫩的hd | 香港成人A级毛片免费看 | 国产淫伦久久久久久久 | 日本高清wwwff174 | 97视频免费在线观看 | 亚洲欧美日韩中文字幕在线一区 | 小伙和少妇干柴烈火 | 亲亲草在线视频 | 国产精品久久久久久久久免费相片 | 无码人妻丰满熟妇啪啪区日韩久久 | 中文字幕人妻中文av不卡专区 | 蜜桃在线一区 | 91天天| 老师掀起裙子让我把j放进去视频 | 亚洲成人一区在线 | 黄色观看 | 久久久首页 | 波多野结衣AV一区二区无码 | 大黄无码网站在线观看 | 欧美成人A片一区二区不卡 www.日日干 麻豆特级毛片 | 亚洲国产看片 | 日本天天躁狠狠躁噜噜噜 | 国产毛片久久久久久蜜臂媒 | 国产亚洲影视在线视频播放 | 婷婷久久久亚洲欧洲日产国码AV | 91视频.com | 国产精品毛片一区视频播不卡 | 99热精品久久只有精品黑人 | 日韩欧美在线播放视频 | 日本熟妇无码色视频网站VR | 欧美一区二区三区诱惑在线 | 国产精品私密保健会所 | 国产亚洲精品俞拍视频 | 亚洲精品三 | 亚洲精品天堂在线观看 | 亚洲国产精品成人精品 | 国产精品1页 |