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发明名称
SPOOL VALVE
摘要
申请公布号
CA575895(A)
申请公布日期
1959.05.12
申请号
CAD575895
申请日期
申请人
BECKETT-HARCUM CO.
发明人
DONALD E. BECKETT;WILLIAM N. BECKETT
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主分类号
代理机构
代理人
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