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经营范围
发明名称
Exhalation valve
摘要
申请公布号
US2174503(A)
申请公布日期
1939.09.26
申请号
US19370149748
申请日期
1937.06.22
申请人
ROBERT MALCOM
发明人
WHIPPLE WILLIS A.
分类号
F16K15/14
主分类号
F16K15/14
代理机构
代理人
主权项
地址
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