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发明名称
Valve cage
摘要
申请公布号
US1777539(A)
申请公布日期
1930.10.07
申请号
US19260101843
申请日期
1926.04.13
申请人
YERKES JOHN A
发明人
YERKES JOHN A.
分类号
F16K15/04
主分类号
F16K15/04
代理机构
代理人
主权项
地址
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