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发明名称
Improvements in rock-drills
摘要
申请公布号
GB735058(A)
申请公布日期
1955.08.10
申请号
GB19520022043
申请日期
1952.09.02
申请人
ROBERT BOSCH, G.M.B.H.
发明人
分类号
B25D17/04;B25F5/00
主分类号
B25D17/04
代理机构
代理人
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