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经营范围
发明名称
Hollow beams
摘要
申请公布号
US2753601(A)
申请公布日期
1956.07.10
申请号
US19520308237
申请日期
1952.09.06
申请人
BERNARD BRUNTON
发明人
BRUNTON BERNARD
分类号
E04C3/14
主分类号
E04C3/14
代理机构
代理人
主权项
地址
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