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发明名称
A rigid metal frame to be used for experiments in mechanics, which can be assembled or dismantled at will
摘要
申请公布号
GB632190(A)
申请公布日期
1949.11.17
申请号
GB19480003746
申请日期
1948.01.01
申请人
DAVID ROBERTSON
发明人
分类号
G09B23/10
主分类号
G09B23/10
代理机构
代理人
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