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发明名称
Installation of underground ducts
摘要
申请公布号
US2325565(A)
申请公布日期
1943.07.27
申请号
US19410373949
申请日期
1941.01.10
申请人
CONSOLIDATED EDISON COMPANY OF NEW YORK, INC.
发明人
WILLIAMS ERNEST
分类号
E21B7/04
主分类号
E21B7/04
代理机构
代理人
主权项
地址
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