好男人日本社区www,无线乱码一二三区免费看,午夜精品久久久久久久久久久久,国产精品9999久久久久

    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)明專利 汽車倒擋中間齒輪齒形精整及倒錐成形模具_副本.jpg10 發(fā)明專利 汽車變速器倒檔齒輪制造工藝_副本.jpg發(fā)明_副本.jpg實新_副本.jpg


Copyright 2017 Reserved By PACIFIC PRECISION FORGING 浙ICP備09074515號