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经营范围
发明名称
Couple d'hélices différenciées et ses applications
摘要
申请公布号
FR908253(A)
申请公布日期
1946.04.04
申请号
FRD908253
申请日期
1944.12.13
申请人
发明人
DALSACE PIERRE-MICHEL
分类号
B64D35/06
主分类号
B64D35/06
代理机构
代理人
主权项
地址
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