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    PPF owns 115 pcs of authorized patents, among which 4 pcs of PCT international patents,30 pcs of national invention patents, 81 pcs of utility model patents. PPF published 35 papers (including 11 core journals, 1 theme report in the 18th World forging conference, 1 reading paper in the 3rd Asia forging Conference)



7 發(fā)明專(zhuān)利 汽車(chē)倒擋中間齒輪齒形精整及倒錐成形模具_(dá)副本.jpg10 發(fā)明專(zhuān)利 汽車(chē)變速器倒檔齒輪制造工藝_副本.jpg發(fā)明_副本.jpg實(shí)新_副本.jpg


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