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发明名称
Channeling machine
摘要
申请公布号
US1858327(A)
申请公布日期
1932.05.17
申请号
US19310522085
申请日期
1931.03.12
申请人
HAYS JOSEPH I
发明人
HAYS JOSEPH I.
分类号
E02F3/76;E02F3/84
主分类号
E02F3/76
代理机构
代理人
主权项
地址
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