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发明名称
摘要
申请公布号
SU431837(A1)
申请公布日期
1974.06.15
申请号
SU19711699387
申请日期
1971.09.22
申请人
发明人
分类号
A01C23/00;(IPC1-7):A01C23/00
主分类号
A01C23/00
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代理人
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