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发明名称
Improvements in mining machines
摘要
申请公布号
GB600849(A)
申请公布日期
1948.04.20
申请号
GB19470005729
申请日期
1944.11.21
申请人
CHARLES EDWIN HAIR
发明人
分类号
E21C37/08
主分类号
E21C37/08
代理机构
代理人
主权项
地址
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