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经营范围
发明名称
Gun perforator
摘要
申请公布号
US2488803(A)
申请公布日期
1949.11.22
申请号
US19460673424
申请日期
1946.05.31
申请人
PAUL CHARRIN
发明人
CHARRIN PAUL
分类号
E21B43/116
主分类号
E21B43/116
代理机构
代理人
主权项
地址
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