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发明名称
Rock picker
摘要
申请公布号
US2806541(A)
申请公布日期
1957.09.17
申请号
US19550534999
申请日期
1955.09.19
申请人
HANLEY FRANCIS J
发明人
HANLEY FRANCIS J.
分类号
A01B43/00
主分类号
A01B43/00
代理机构
代理人
主权项
地址
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