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发明名称
Spring conditioning device
摘要
申请公布号
US1817877(A)
申请公布日期
1931.08.04
申请号
US19300478248
申请日期
1930.08.27
申请人
CAWLEY EDWARD D
发明人
CAWLEY EDWARD D.
分类号
B21F3/02;B21F35/00
主分类号
B21F3/02
代理机构
代理人
主权项
地址
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