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发明名称
TRENCH DUCTS
摘要
申请公布号
US3550336(A)
申请公布日期
1970.12.29
申请号
USD3550336
申请日期
1969.02.24
申请人
TEXTRON INC.
发明人
LEO J. HALKOVICH;STEPHEN M. JANIC
分类号
E04B5/48;(IPC1-7):E04F17/08
主分类号
E04B5/48
代理机构
代理人
主权项
地址
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