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经营范围
发明名称
Oxygen regulator
摘要
申请公布号
US2220905(A)
申请公布日期
1940.11.12
申请号
US19370171897
申请日期
1937.10.30
申请人
JOHNSON DANIEL P
发明人
JOHNSON DANIEL P.
分类号
A62B9/02;G05D16/06
主分类号
A62B9/02
代理机构
代理人
主权项
地址
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