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发明名称
Extensible structure
摘要
申请公布号
US2767812(A)
申请公布日期
1956.10.23
申请号
US19520282430
申请日期
1952.04.15
申请人
BOGER RAY E
发明人
BOGER RAY E.
分类号
B66F3/22;B66F7/06;B66F11/04;E04G1/22;E04H12/18
主分类号
B66F3/22
代理机构
代理人
主权项
地址
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