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发明名称
摘要
申请公布号
PL93423(B1)
申请公布日期
1977.05.30
申请号
PL19750178150
申请日期
1975.02.19
申请人
发明人
分类号
B04C5/23;(IPC1-7):B04C5/23
主分类号
B04C5/23
代理机构
代理人
主权项
地址
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