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发明名称
Spring and method
摘要
申请公布号
US2527521(A)
申请公布日期
1950.10.31
申请号
US19480057761
申请日期
1948.11.01
申请人
ARMCO STEEL CORPORATION
发明人
BLOOM FREDRICK KENNETH
分类号
C21D9/02;F16F1/02
主分类号
C21D9/02
代理机构
代理人
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地址
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