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发明名称
ROOFING MATERIAL MANUFACTURE
摘要
申请公布号
CA396336(A)
申请公布日期
1941.05.06
申请号
CAD396336
申请日期
申请人
CANADIAN GYPSUM COMPANY
发明人
FRANK B. BURNS
分类号
主分类号
代理机构
代理人
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地址
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