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经营范围
发明名称
Gate valve
摘要
申请公布号
US2854209(A)
申请公布日期
1958.09.30
申请号
US19570633319
申请日期
1957.01.09
申请人
ERWIN ROBERT L
发明人
ERWIN ROBERT L.
分类号
F16K3/20
主分类号
F16K3/20
代理机构
代理人
主权项
地址
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