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王旭锋

Patents

一种锚杆支护用梯子梁

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Disigner of the Invention:zhangdongsheng

Note:张东升

Type of Patent:国际

State of Patent:专利授权

Application Number:201120330848.2

Number of Inventors:2

Service Invention or Not:no

Application Date:2011-08-29

Authorization Date:2012-10-24

First Author:wangxufeng