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发明名称
Extensible trestle
摘要
申请公布号
US2572928(A)
申请公布日期
1951.10.30
申请号
US19470793392
申请日期
1947.12.23
申请人
KWIKFORM LIMITED
发明人
HAWES ALBERT HENRY
分类号
E04G1/32
主分类号
E04G1/32
代理机构
代理人
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