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经营范围
发明名称
Blasting plug
摘要
申请公布号
US2449645(A)
申请公布日期
1948.09.21
申请号
US19470728264
申请日期
1947.02.13
申请人
E. I. DU PONT DE NEMOURS & COMPANY
发明人
PONT JAMES Q. DU;JONES EARL R.
分类号
F42D1/18
主分类号
F42D1/18
代理机构
代理人
主权项
地址
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