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发明名称
摘要
申请公布号
CS175359(B2)
申请公布日期
1977.05.31
申请号
CS19730006289
申请日期
1973.09.11
申请人
发明人
分类号
B04B1/14;B04B1/20;B04B5/00;(IPC1-7):B04B1/10
主分类号
B04B1/14
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代理人
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