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发明名称
Structural member
摘要
申请公布号
US2241952(A)
申请公布日期
1941.05.13
申请号
US19390261245
申请日期
1939.03.11
申请人
LACHMAN LAURENCE S
发明人
LACHMAN LAURENCE S.
分类号
E04C2/42
主分类号
E04C2/42
代理机构
代理人
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