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经营范围
发明名称
Hollow cylinder or bushing and method of recessing the same
摘要
申请公布号
US1751906(A)
申请公布日期
1930.03.25
申请号
US19260157318
申请日期
1926.12.27
申请人
MERRIMAN BROTHERS, INC.
发明人
CLARK GEORGE HALL
分类号
B21D53/00;B23B41/12;F16C33/14;F16C33/24
主分类号
B21D53/00
代理机构
代理人
主权项
地址
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