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发明专利：高速机车转向架三爪连杆盘直齿端齿连结结构[P]CN102198836A

Type of Patent: Software copyright

Service Invention or Not: no

First Author: 张红军,Yuan Yao,zhongwensheng

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发明专利：圆弧端齿齿形加工方法[P] CN101733485A

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