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发明名称
Balanced shut-off valve
摘要
申请公布号
US3331583(A)
申请公布日期
1967.07.18
申请号
US19660564470
申请日期
1966.06.23
申请人
ELIZABETH N. WILLIS
发明人
BACKER WILLIAM J.
分类号
F16K31/122
主分类号
F16K31/122
代理机构
代理人
主权项
地址
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