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发明名称
摘要
申请公布号
NL6717706(A)
申请公布日期
1969.07.01
申请号
NL19670017706
申请日期
1967.12.27
申请人
发明人
分类号
A01C23/02;(IPC1-7):A01C23/02
主分类号
A01C23/02
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代理人
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