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发明名称
Valve
摘要
申请公布号
US2192193(A)
申请公布日期
1940.03.05
申请号
US19370123023
申请日期
1937.01.29
申请人
JOHNSON ARTHUR J
发明人
JOHNSON ARTHUR J.
分类号
G05D23/12
主分类号
G05D23/12
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代理人
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