Nanjing Dengfeng Heavy Industry Group Co. Ltd. and CCCC Second Aviation Bureau Fourth Engineering Co. Ltd.


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2018-08-17

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Nanjing Dengfeng Heavy Industry Group Co. Ltd. and CCCC Second Aviation Bureau Fourth Engineering Co. Ltd. jointly applied for the patent of "Slot Girder Laying Machine" which was approved by the State Intellectual Property Office on August 17, 2018 and granted on

 Nanjing Dengfeng Heavy Industry Group Co. Ltd. and CCCC Second Aviation Bureau Fourth Engineering Co. Ltd. jointly applied for the patent of "Slot Girder Laying Machine" which was approved by the State Intellectual Property Office on August 17, 2018 and granted on

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