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经营范围
发明名称
Perfectionnements apportés aux soupapes
摘要
申请公布号
FR905730(A)
申请公布日期
1945.12.12
申请号
FRD905730
申请日期
1944.07.08
申请人
发明人
HAGE DAVID
分类号
F16K15/20
主分类号
F16K15/20
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代理人
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