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发明名称
FURROW OPENER DISK
摘要
申请公布号
CA524397(A)
申请公布日期
1956.05.01
申请号
CAD524397
申请日期
申请人
JOSEPH GREAVES
发明人
JOSEPH GREAVES
分类号
主分类号
代理机构
代理人
主权项
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