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经营范围
发明名称
Improvements in or relating to rock drills
摘要
申请公布号
GB738946(A)
申请公布日期
1955.10.19
申请号
GB19530031095
申请日期
1953.11.10
申请人
TAMMERFORS LINNE-OCH JERN-MANUFAKTURAKTIE-BOLAG
发明人
DONNER HANS OTTO
分类号
E21B10/58
主分类号
E21B10/58
代理机构
代理人
主权项
地址
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