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The National Security Intellectual Property Office granted [Metal-new] a utility model patent certificate for "a breathable plug for the bottom vent stirring of a melting furnace and a melting furnace containing the breathable plug".
The National Security Intellectual Property Office granted [Metal-new] a utility model patent certificate for "a breathable plug for the bottom vent stirring of a melting furnace and a melting furnace containing the breathable plug".
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On March 19, 2019, the National Intellectual Property Office of the People's Republic of China granted six inventors, including Ke Dongjie, Ke Yucheng, Ke Jinping, and Chen Qun, utility model patent certificates for a breathable plug used for ventilation and stirring at the bottom of a smelting furnace and a smelting furnace containing the breathable plug.
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