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发明名称
Valve
摘要
申请公布号
US2431283(A)
申请公布日期
1947.11.18
申请号
US19420470075
申请日期
1942.12.24
申请人
SPENCE ENGINEERING COMPANY, INC.
发明人
SPENCE PAULSEN
分类号
G05D16/16
主分类号
G05D16/16
代理机构
代理人
主权项
地址
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