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发明名称
Underground conduit
摘要
申请公布号
US2013888(A)
申请公布日期
1935.09.10
申请号
US19330672018
申请日期
1933.05.20
申请人
UNDERGROUND STEAM CONSTRUCTION COMPANY
发明人
KEEFE EDMUND T.;MCGREGOR HAROLD E.
分类号
F16L3/18;F16L57/00
主分类号
F16L3/18
代理机构
代理人
主权项
地址
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