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发明名称
IMPROVEMENTS IN ROOF STRUCTURES
摘要
申请公布号
EP0284319(A3)
申请公布日期
1989.01.25
申请号
EP19880302439
申请日期
1988.03.21
申请人
LEA, SANDRA
发明人
LEA, SANDRA
分类号
E04B7/22;E04D13/17;(IPC1-7):E04D13/16
主分类号
E04B7/22
代理机构
代理人
主权项
地址
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