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发明名称
Demonstration device
摘要
申请公布号
US2846059(A)
申请公布日期
1958.08.05
申请号
US19570682369
申请日期
1957.09.06
申请人
METALS & CONTROLS CORPORATION
发明人
SAVOLAINEN UNTO U.
分类号
G09B23/16
主分类号
G09B23/16
代理机构
代理人
主权项
地址
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