嗯嗯好紧,黄片网站免费观看,欧美激情亚洲春色,免费黄片汇

COMPANY INTRODUCTION

SIYUAN is among the first companies in China holding integrated class-A qualifications on engineering design, with more than 20 class-A and special certification on surveying & mapping, environmental impact assessment, water resources assessment, water and soil conservation design, engineering consulting, engineering supervision, and engineering cost, etc.. SIYUAN has organized the preparation and compiling of more than 10 national and industrial codes and standards. Since its establishment, SIYUAN has built up its design brand featuring road network planning, railway junction terminal, high standard railway, complex mountain area railway, railway station building, underwater tunnel, light rail, metro, bridge, soft foundation treatment, and environmental impact assessment, etc.. SIYUA has been awarded the national class-A design credit certificate, and has been authorized with the right for overseas business operation by the Ministry of Foreign Trade and Economic Cooperation. SIYUAN follows the management system of ISO9001, SO14001, and GB/T28001, which has been audited and certified.

Since its establishment, SIYUAN has been honored with over 400 awards at both state and provincial levels for progress in science and technology, excellent engineering survey & design, excellent software, excellent standard design, etc.. Wherein, the new construction method for Dayoaoshan Mountain long-large railway tunnel has won the national award for scientific and technological progress; the marshalling station and related works of Xuzhou terminal expansion project, general design of Beijing-Kowloon railway, high-speed design of Guangzhou-Shenzhen railway, and the computer-aided alignment design have won the top national award for excellent design — national excellent design golden award. More than 140 design projects have been listed as new records of Chinese enterprises. At present, SIYUAN owns up to 80 effective patents. 

Produced By 大漢網(wǎng)絡(luò) 大漢版通發(fā)布系統(tǒng) 亚洲av永久无码天堂网毛片| 久久亚洲男人天堂| 91欧美视频| 日韩高清不卡| 日韩一区欧美一区性色99| overflow在线| 日韩资源亚洲一区| 五十丰满熟妇性旺盛| 男女真人AV| 秋霞一区人妖| 欧美性爱白浆在线观看| 亚洲成av人片无码不卡播放器| 日韩一区二区三区网站| 久久丁香综合| 国产婷婷一区二区三区久久| 八戒影院| 日韩av一区二区三区免费看| a√天堂成全成人| 毛片中心8久久久久久久久久| 亚洲伊人av| 日本久久精品一区二区三| 人妻在线日韩免费视频| 一夲道有码| 久久精品综合无码国产综合| 欧美呦呦网| 99国产精品国产精品九九| 91精品国产综合久久久动漫日韩| 丝袜亚洲精品中文第一区| 本道久射| 日韩在线观看| 国产精品爆乳奶水无码视频| 香港性久久久| 欧美激情视频精品一区| 河曲县| 羞羞影视| 免费黄色视屏| 无码一区二区三区老色鬼 | 日韩一吸| 欧美99精品| 国产美女精品视频八区| 91色欲|