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经营范围
发明名称
Shaft mucker
摘要
申请公布号
US2492217(A)
申请公布日期
1949.12.27
申请号
US19460715069
申请日期
1946.12.09
申请人
GRISMER JOSEPH V
发明人
GRISMER JOSEPH V.
分类号
E21D1/03
主分类号
E21D1/03
代理机构
代理人
主权项
地址
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