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发明名称
摘要
申请公布号
NL6811709(A)
申请公布日期
1969.02.28
申请号
NL19680011709
申请日期
1968.08.16
申请人
发明人
分类号
D06P1/30;D06P1/52;D06P1/645;D06P3/82;(IPC1-7):D06P/
主分类号
D06P1/30
代理机构
代理人
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