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发明名称
Signal handle for valves
摘要
A handle assembly secured to a conventional valve stem, provided with indicia to indicate whether or not the valve is opened or closed.
申请公布号
US3910308(A)
申请公布日期
1975.10.07
申请号
US19730414162
申请日期
1973.11.08
申请人
MACK, PHILLIP R.
发明人
MACK, PHILLIP R.
分类号
F16K31/60;(IPC1-7):F16K31/60;F16K37/00
主分类号
F16K31/60
代理机构
代理人
主权项
地址
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