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经营范围
发明名称
Improvements in pencil leads, crayons and like marking substances
摘要
申请公布号
GB686444(A)
申请公布日期
1953.01.28
申请号
GB19480028998
申请日期
1948.11.08
申请人
ANDRE ROBERT JULIEN
发明人
分类号
C09D13/00
主分类号
C09D13/00
代理机构
代理人
主权项
地址
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