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发明名称
Subaquatic rock drilling devices
摘要
申请公布号
GB343664(A)
申请公布日期
1931.02.26
申请号
GB19290039608
申请日期
1929.12.27
申请人
WILLIAM DUNCAN GRANT
发明人
分类号
E02B3/02
主分类号
E02B3/02
代理机构
代理人
主权项
地址
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