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发明名称
Extendible feed leg for rock and like drilling machines
摘要
申请公布号
GB834214(A)
申请公布日期
1960.05.04
申请号
GB19550016791
申请日期
1955.06.10
申请人
HARDYPICK LIMITED
发明人
GREY NORMAN KENDALL
分类号
E21B19/087
主分类号
E21B19/087
代理机构
代理人
主权项
地址
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