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发明名称
Improvements in or relating to anti-negative g valve mechanism for respiratory appliances
摘要
申请公布号
GB788339(A)
申请公布日期
1957.12.23
申请号
GB19550031910
申请日期
1955.11.08
申请人
THE ARO EQUIPMENT CORPORATION
发明人
WILKENING WALTER OTTO
分类号
A62B7/14
主分类号
A62B7/14
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代理人
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