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发明名称
DUAL SAFETY VALVE INSTALLATION
摘要
申请公布号
CA841398(A)
申请公布日期
1970.05.12
申请号
CAD841398
申请日期
申请人
OTIS ENGINEERING CORPORATION
发明人
JOHN V. FREDD;PHILLIP S. SIZER;TURNER G. GARWOOD
分类号
主分类号
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