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发明名称
An improvements in or relating to see-saws
摘要
申请公布号
GB498084(A)
申请公布日期
1939.01.03
申请号
GB19370029431
申请日期
1937.10.28
申请人
B. HIRST & SONS, LIMITED;CLEMENT HIRST
发明人
分类号
A63G11/00
主分类号
A63G11/00
代理机构
代理人
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地址
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