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发明名称
摘要
申请公布号
FR1600802(A)
申请公布日期
1970.08.03
申请号
FRD1600802
申请日期
1968.06.17
申请人
发明人
分类号
B21D53/04;F28D1/03
主分类号
B21D53/04
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