十八以下岁女子毛片_精品黑人一区二区三区久久_啊灬啊灬啊灬快灬水多多游戏特色_中文字幕乱偷无码动漫av_国产亚洲成av人片在线观黄桃_国产精品99久久不卡_色yeye香蕉凹凸一区二区_国产激情一区二区三区老熟女_一个人看的片免费高清大全

Company News
Weifang Changda Construction Group has won 10 patents more.

     This year, the achievements of science and technology innovation are constantly emerging. Up to October 31 this year we have won two "patents fo invention" and eight "patents for utility model" authorization.

     These 10 patents are respectively: invention patents: building interior wall plastering construction method/the filling pile static load test of pile head fixed method, the patent for utility model: a kind of pipe plugging device/a turnover of reinforcing steel bar stool/ceiling drilling device/a scaffold even wall exterior walls/a floor drain construction fitting/ a sealing device/ buried in a rubber water-stop fixing device/a kind of emergency lighting control circuit.