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发明名称
FIRE RESISTANT CLOSURE FOR PASSAGEWAYS
摘要
申请公布号
CA742912(A)
申请公布日期
1966.09.20
申请号
CAD742912
申请日期
申请人
WILLIAM A. BEAR
发明人
WILLIAM A. BEAR
分类号
主分类号
代理机构
代理人
主权项
地址
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