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发明名称
Valve mechanism for motors of pumps
摘要
申请公布号
US2183539(A)
申请公布日期
1939.12.19
申请号
US19380186250
申请日期
1938.01.21
申请人
DAVID BUTLER FRANK
发明人
BUTLER FRANK DAVID
分类号
F04B9/10
主分类号
F04B9/10
代理机构
代理人
主权项
地址
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