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经营范围
发明名称
Perfectionnement aux hélices à pas variable
摘要
申请公布号
FR916702(A)
申请公布日期
1946.12.13
申请号
FRD916702
申请日期
1945.10.31
申请人
J. STONE & COMPANY LIMITED
发明人
分类号
B63H3/04
主分类号
B63H3/04
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代理人
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