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发明名称
Valve operator
摘要
申请公布号
US2724288(A)
申请公布日期
1955.11.22
申请号
US19520316040
申请日期
1952.10.21
申请人
BENSON RONALD C
发明人
BENSON RONALD C.
分类号
F16K31/05
主分类号
F16K31/05
代理机构
代理人
主权项
地址
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