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发明名称
摘要
申请公布号
JPS5318987(B2)
申请公布日期
1978.06.17
申请号
JP19720079819
申请日期
1972.08.09
申请人
发明人
分类号
B21C23/22;C22C1/00
主分类号
B21C23/22
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