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发明名称
Collapsible stage structure
摘要
申请公布号
US2846221(A)
申请公布日期
1958.08.05
申请号
US19540448800
申请日期
1954.08.10
申请人
SKINNER CHARLES E
发明人
SKINNER CHARLES E.
分类号
A63J1/00
主分类号
A63J1/00
代理机构
代理人
主权项
地址
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