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发明名称
BREATHING-TUBE CHECK VALVE
摘要
申请公布号
US3621868(A)
申请公布日期
1971.11.23
申请号
USD3621868
申请日期
1970.09.14
申请人
MINE SAFETY APPLIANCES CO.
发明人
LAYTON A. WISE
分类号
A62B9/04;A62B18/08;(IPC1-7):F16K51/00
主分类号
A62B9/04
代理机构
代理人
主权项
地址
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