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发明名称
Pressure and vacuum supplying apparatus for testing pressure responsive instruments
摘要
申请公布号
US2478938(A)
申请公布日期
1949.08.16
申请号
US19440555621
申请日期
1944.09.25
申请人
RALPH R. ROEMER;LOUIS E. ROEMER;WILLIAM R. KIEFER;J. EVERETTE TOMPKINS
发明人
OSTERHUS ERVIN J.
分类号
B64D45/00;F15B19/00
主分类号
B64D45/00
代理机构
代理人
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地址
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