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发明名称
Improvements in balanced breathable gas delivery valves for breathing apparatus
摘要
申请公布号
GB851214(A)
申请公布日期
1960.10.12
申请号
GB19570011199
申请日期
1957.04.05
申请人
LA SPIROTECHNIQUE
发明人
分类号
A62B9/02
主分类号
A62B9/02
代理机构
代理人
主权项
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