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发明名称
BALL VALVE STRUCTURE
摘要
申请公布号
CA882527(A)
申请公布日期
1971.10.05
申请号
CAD882527
申请日期
申请人
HENRY PRATT COMPANY
发明人
DONALD G. FAWKES
分类号
主分类号
代理机构
代理人
主权项
地址
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