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发明名称
Time delay apparatus with in-line construction for bi-directional flow
摘要
申请公布号
US3238964(A)
申请公布日期
1966.03.08
申请号
US19630276530
申请日期
1963.04.29
申请人
LUDWIG WALTER D
发明人
LUDWIG WALTER D.
分类号
F15B21/02
主分类号
F15B21/02
代理机构
代理人
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地址
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