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发明名称
HOPPER VALVE FOR FILTER BAG INSTALLATION
摘要
申请公布号
CA819515(A)
申请公布日期
1969.08.05
申请号
CAD819515
申请日期
申请人
RESEARCH-COTTRELL
发明人
ROBERT R. JOHNSON
分类号
主分类号
代理机构
代理人
主权项
地址
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