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发明名称
摘要
申请公布号
GB1252008(A)
申请公布日期
1971.11.03
申请号
GBD1252008
申请日期
1968.11.04
申请人
发明人
分类号
A01D57/02;A01D90/04
主分类号
A01D57/02
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