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发明名称
Improvements in mining cartridges
摘要
申请公布号
GB541444(A)
申请公布日期
1941.11.27
申请号
GB19390020459
申请日期
1939.07.13
申请人
SAMUEL GIBSON FRANTZ
发明人
分类号
E21C37/10;F42B3/00;F42D1/20
主分类号
E21C37/10
代理机构
代理人
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地址
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