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发明名称
Improvements in or relating to boring grabs for boring wells and the like
摘要
申请公布号
GB665909(A)
申请公布日期
1952.01.30
申请号
GB19500030522
申请日期
1949.06.17
申请人
ALBERT WILFRED JUPP;GEORGE STOW & COMPANY LIMITED
发明人
分类号
E02F3/47;E21B11/04
主分类号
E02F3/47
代理机构
代理人
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地址
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