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发明名称
摘要
申请公布号
JPS49247(Y1)
申请公布日期
1974.01.07
申请号
JP19690071291U
申请日期
1969.07.26
申请人
发明人
分类号
A01C1/02;(IPC1-7):A01C1/02
主分类号
A01C1/02
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代理人
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