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发明名称
Shaft sealing device with standby seal
摘要
申请公布号
US2818286(A)
申请公布日期
1957.12.31
申请号
US19550514977
申请日期
1955.06.13
申请人
PACIFIC PUMPS, INC.
发明人
HARNEY DORAN B.
分类号
F04B53/16;F16J15/00
主分类号
F04B53/16
代理机构
代理人
主权项
地址
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