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发明名称
Thief-hole cover
摘要
申请公布号
US1753394(A)
申请公布日期
1930.04.08
申请号
US19280281909
申请日期
1928.05.31
申请人
WATSON ORVILLE C
发明人
WATSON ORVILLE C.
分类号
F16J13/04
主分类号
F16J13/04
代理机构
代理人
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地址
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