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发明名称
Differential pressure responsive shaft seal apparatus
摘要
申请公布号
US3403915(A)
申请公布日期
1968.10.01
申请号
US19660521453
申请日期
1966.01.18
申请人
HARRISON W. ROBERTS
发明人
ROBERTS HARRISON W.
分类号
F16J15/40
主分类号
F16J15/40
代理机构
代理人
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地址
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