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发明名称
摘要
申请公布号
SU506435(A1)
申请公布日期
1976.03.15
申请号
SU19741988428
申请日期
1974.01.16
申请人
发明人
分类号
B04B7/08;(IPC1-7):B04B7/08
主分类号
B04B7/08
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代理人
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地址
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