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发明名称
Methods of making structural beams
摘要
申请公布号
US3050831(A)
申请公布日期
1962.08.28
申请号
US19600017994
申请日期
1960.03.28
申请人
HARRY DIAMOND
发明人
DIAMOND HARRY
分类号
B21D47/04;E04C3/04;E04C3/08
主分类号
B21D47/04
代理机构
代理人
主权项
地址
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