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发明名称
ROOF SPACE VENTILATION DEVICE
摘要
申请公布号
GB8307048(D0)
申请公布日期
1983.04.20
申请号
GB19830007048
申请日期
1983.03.15
申请人
GRA-MAR BUILDING PRODUCTS LTD
发明人
分类号
E04B1/70;(IPC1-7):E04B1/70
主分类号
E04B1/70
代理机构
代理人
主权项
地址
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