美女露100%双奶头无遮挡,久爱WWW成人网免费视频,亚洲AV无码国产一区二区三区,亚洲爆乳精品无码一区二区三区

  

Bu Qingsong

 

 Bu Qingsong, associate researcher of Energy Saving & Environmental Protection & Occupational Safety and Health Research Institute of China Academy of Railway Sciences Corporation with a master’s degree, is mainly engaged in technical research, experimental consultation and administrative management in the fields of railway ecological environment protection, noise & vibration control, etc. Bu has led and participated in drafting of several national standards related to vibration and impact such as "analysis and research on the damping effect of typical ground barriers on railway track", "noise field distribution, source intensity characteristics and attenuation law of passenger dedicated lines", "implementation and evaluation method of railway environmental noise standards" and "post-evaluation research on ecological environment of Qinghai-Tibet Railway". Bu's research results have been applied in key projects such as Qinghai-Tibet Railway, Beijing-Shanghai High Speed Railway and Beijing Metro. He has provided valuable references and relevant suggestions for railway environmental vibration control, train noise source intensity and implementation standards, ecological environment protection for plateau railways, and pollution control of urban rail transit systems, as well as the basis for guiding environmental impact assessment of railway construction projects on noise and vibration source intensity and control measures. He also led or participated in national, provincial and ministerial and railway administration scientific research projects, and has won many third-class and second-class prizes.
附件:
回到頂部
   欧美电影在线观看| 泳池里强摁做开腿呻吟| 免费人成视频x8x8入口观看大| 顶级少妇做爰视频在线观看| 少妇高潮惨叫久久久久久| 国产vpswindows精品| 少妇把腿扒开让我爽爽视频| 亚洲乱码无码永久不卡在线| 中国熟妇xxxx| 亚洲国产av一区二区三区 | 亚洲欧美综合区自拍另类| 欧美乱妇无码毛片斯巴达三百勇士| 丰满少妇被猛烈进入| 小浪货腿打开水真多真紧| 人妻丰满熟妇av无码区免| 性一交一乱一色一视频| 久久人人妻人人做人人爽| free性丰满hd性欧美| 无码精油按摩潮喷在播放| 亚洲欧美精品SUV| 精产国品一二三产区区别在线观看 | 久久www成人_看片免费不卡| 丰满少妇弄高潮了www| 日本熟妇xxxx乱| 亚洲精品区无码欧美日韩| 日本19禁啪啪吃奶大尺度| 久久久久国色av免费观看 | 丰满少妇a级毛片| 亚洲乱码无码永久不卡在线| 亚洲中文字幕久久精品无码喷水| 中文字幕人成人乱码亚洲影| 又大又粗又硬又长| 国产成人久久婷婷精品流白浆| 青青青伊人色综合久久| 被多人玩弄的烂货| 国产无遮挡裸体免费视频a片| 激情的丝袜麻麻| WWW国产精品内射老熟女| 亚洲熟妇无码久久精品| 国产一区二区波多野结衣| 欧美又粗又大xxxxbbbb疯狂 |