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经营范围
发明名称
Cementitious conduit
摘要
申请公布号
US1959511(A)
申请公布日期
1934.05.22
申请号
US19310554985
申请日期
1931.08.04
申请人
VENZIE FREDERICK M
发明人
VENZIE FREDERICK M.
分类号
F16L13/11
主分类号
F16L13/11
代理机构
代理人
主权项
地址
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