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一种带有复合螺旋耐磨层的抽油杆及制备装置和制备方法

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Affilication of Author(s):材料科学与工程学院

Type of Patent:发明

Application Number:201510431844.6

Number of Inventors:1

Service Invention or Not:no

Application Date:2015-07-21

Publication Date:2018-03-02

Authorization Date:2018-03-02

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