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发明名称
Vacuum breaker
摘要
申请公布号
US2023178(A)
申请公布日期
1935.12.03
申请号
US19350033859
申请日期
1935.07.30
申请人
MARY A. M. LUFF
发明人
LUFF HENRY J.
分类号
E03C1/10
主分类号
E03C1/10
代理机构
代理人
主权项
地址
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