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发明名称
Ceiling construction
摘要
申请公布号
US1902835(A)
申请公布日期
1933.03.28
申请号
US19300474132
申请日期
1930.08.09
申请人
THE UNITED STATES GYPSUM CO.
发明人
BIRDSEY CHARLES R.
分类号
E04B9/16
主分类号
E04B9/16
代理机构
代理人
主权项
地址
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