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发明名称
Fibrous tube
摘要
申请公布号
US2261985(A)
申请公布日期
1941.11.11
申请号
US19400313377
申请日期
1940.01.11
申请人
HERCULES POWDER COMPANY
发明人
FORSTER ALBERT E.
分类号
E21B17/00;F16L9/00
主分类号
E21B17/00
代理机构
代理人
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地址
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