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发明名称
Plumbing cleanout attachment
摘要
申请公布号
US2490422(A)
申请公布日期
1949.12.06
申请号
US19460681089
申请日期
1946.07.02
申请人
DENISON LOUIS S
发明人
DENISON LOUIS S.
分类号
B08B9/02;E03C1/306
主分类号
B08B9/02
代理机构
代理人
主权项
地址
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