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发明名称
Perfectionnements aux crayons à mine coulissante et interchangeable
摘要
申请公布号
FR987741(A)
申请公布日期
1951.08.17
申请号
FRD987741
申请日期
1949.06.02
申请人
发明人
SCOTTON LINCHIAO
分类号
B43K21/06
主分类号
B43K21/06
代理机构
代理人
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