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发明名称
Corrugated type skylight shading
摘要
申请公布号
US3009389(A)
申请公布日期
1961.11.21
申请号
US19550507803
申请日期
1955.05.12
申请人
EWING DEVELOPMENT COMPANY
发明人
EWING WALKLEY B.
分类号
B21D47/00;E04D3/28
主分类号
B21D47/00
代理机构
代理人
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