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发明名称
Roofing construction
摘要
申请公布号
US2122077(A)
申请公布日期
1938.06.28
申请号
US19370155500
申请日期
1937.07.24
申请人
WALL AYANA L
发明人
WALL AYANA L.
分类号
E04D1/26
主分类号
E04D1/26
代理机构
代理人
主权项
地址
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