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发明名称
Apparatus for use in and method of assembling spring constructions
摘要
申请公布号
US1820537(A)
申请公布日期
1931.08.25
申请号
US19300421506
申请日期
1930.01.17
申请人
KELLAR FRANCIS A
发明人
KELLAR FRANCIS A.
分类号
B21F33/04
主分类号
B21F33/04
代理机构
代理人
主权项
地址
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