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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.
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