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经营范围
发明名称
Bearing members for rock bolts
摘要
申请公布号
AU254241(B2)
申请公布日期
1963.05.02
申请号
AU19610010392
申请日期
1961.10.18
申请人
发明人
CUMMING JAMES D
分类号
E21D21/00
主分类号
E21D21/00
代理机构
代理人
主权项
地址
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