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发明名称
Building block
摘要
申请公布号
US2720104(A)
申请公布日期
1955.10.11
申请号
US19520265991
申请日期
1952.01.11
申请人
CAMERON FRANK M
发明人
CAMERON FRANK M.
分类号
E04B2/02;E04B2/42
主分类号
E04B2/02
代理机构
代理人
主权项
地址
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