gogo全球大胆高清人露出91_欧美日韩高清在线一区_国产99久久九九精品的功能介绍_青春草在线免费视频_香蕉久久夜色精品国产使用方法_久久成人免费视频

 On 7^th November, 2013, approved by the department of housing and urban-rural development, the group company of steel structure project specialized contracting qualification by the secondary promoted to level.Since then, the group in the steel structure of contracting scope will expand to undertake various types of steel structure engineering, including network frame, light steel structure engineering, production and installation, continue to promote the group to further improve the market competitiveness.
    Steel structure project specialized contracting qualification is different from other professional contracting qualification, the qualification to the ministry of construction for approval.The steel structure engineering qualification promotion work after the data sorting, filing, project performance auditing on-site check, the ministry of construction, public announcements, etc