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发明名称
Rock anchoring device
摘要
申请公布号
GB1149226(A)
申请公布日期
1969.04.16
申请号
GB19670015235
申请日期
1967.04.03
申请人
CHESTER IRVING WILLIAMS
发明人
CHESTER IRVING WILLIAMS
分类号
E21D21/00;F16B13/06
主分类号
E21D21/00
代理机构
代理人
主权项
地址
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