国产美女一级片_成人性生交大片免费_国产性猛交粗暴力xxxx_久久久夜色精品亚洲a_麻豆一二三专区入口_国产精品热视频

 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