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发明名称
摘要
申请公布号
JPS4989921(A)
申请公布日期
1974.08.28
申请号
JP19730142531
申请日期
1973.12.21
申请人
发明人
分类号
B22D45/00;C21B7/00;F16K17/00
主分类号
B22D45/00
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代理人
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地址
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