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经营范围
发明名称
Articulated beam
摘要
申请公布号
US2620904(A)
申请公布日期
1952.12.09
申请号
US19460687350
申请日期
1946.07.31
申请人
LE ROY MICHAEL
发明人
ROY MICHAEL LE
分类号
E04C3/00
主分类号
E04C3/00
代理机构
代理人
主权项
地址
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