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发明名称
Improvements in or relating to rock-drills
摘要
申请公布号
GB400434(A)
申请公布日期
1933.10.26
申请号
GB19320033305
申请日期
1932.11.24
申请人
BENJAMIN COCK;HOLMAN BROTHERS LIMITED
发明人
分类号
B25D9/20
主分类号
B25D9/20
代理机构
代理人
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地址
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