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发明名称
ANCHORING AND ADVANCING MEANS
摘要
申请公布号
GB1585118(A)
申请公布日期
1981.02.25
申请号
GB19760027631
申请日期
1977.07.01
申请人
GULLICK DOBSON LTD
发明人
分类号
E21F13/10;(IPC1-7):E21C35/14
主分类号
E21F13/10
代理机构
代理人
主权项
地址
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