成人做爰视频www_天天搡天天狠天干天啪啪_驯服人妻hd中字日本_gogogo免费视频观看_亚洲图片自拍偷图区_宝贝再忍点灬舒服灬大点视频_娇乳欲女h奶汁翘_中文字幕av免费专区_性欧美老人牲交xxxxx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