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经营范围
发明名称
Rock boring head having a simple chisel cutting edge for percussive boring
摘要
申请公布号
GB652562(A)
申请公布日期
1951.04.25
申请号
GB19480025532
申请日期
1948.09.30
申请人
GEBR. BOHLER & CO. AKTIENGESELLSCHAFT
发明人
分类号
E21B10/36
主分类号
E21B10/36
代理机构
代理人
主权项
地址
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