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经营范围
发明名称
Voie permanente perfectionnée et procédé pour augmenter la stabilité de son ballast
摘要
申请公布号
FR1390085(A)
申请公布日期
1965.02.19
申请号
FR19640972073
申请日期
1964.04.23
申请人
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ N. V.
发明人
分类号
E01B1/00
主分类号
E01B1/00
代理机构
代理人
主权项
地址
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