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发明名称
Clogged sewer cutting head
摘要
申请公布号
US2287916(A)
申请公布日期
1942.06.30
申请号
US19390303394
申请日期
1939.11.08
申请人
HENRY A. LUELF
发明人
THERRIEN ROBERT F.
分类号
E03F9/00
主分类号
E03F9/00
代理机构
代理人
主权项
地址
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