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发明名称
Placer mining machine
摘要
申请公布号
US2122822(A)
申请公布日期
1938.07.05
申请号
US19360103021
申请日期
1936.09.28
申请人
NOEL JAMES F
发明人
NOEL JAMES F.
分类号
B03B5/02
主分类号
B03B5/02
代理机构
代理人
主权项
地址
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