Yueyang Trace energy-saving equipment factory|Our History|Yueyang Trace energy-saving equipment factory|Our History Yueyang Trace energy-saving equipment factory|Our History|Yueyang Trace energy-saving equipment factory|Our History
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Yellow River delta rise largest oil equipment industry base in China
Since 2008, the China(Dongying) International Petroleum and Petrochemical Equipm...
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The 2018 51 model worker Zhang Xinfu


The 2018 51 model worker Zhang refers to the navigation


The 2017 51 labor model Liu Yao

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